Both cause shin pain that builds with running or jumping, often after a quick rise in training, which is why they are easy to mix up. Shin splints (medial tibial stress syndrome) is pain and tenderness spread along the inner edge of the shin bone, while a stress fracture is a small crack where repeated loading has outpaced the bone's repair, and it usually hurts at one spot. The difference matters early: many runners with shin splints cut back or briefly pause running and then rebuild, while a suspected stress fracture means stopping running and jumping until it has been checked.
Written by Kareem Hassanein, Registered Physiotherapist. Burlington, Ontario. This is a guide, not a diagnosis. An in-person exam usually narrows it down, though the two can overlap and some cases need imaging or a second look.
Other ComparisonsThe patterns that separate shin splints from stress fracture in clinic. Read across each row and compare.
| Aspect | Shin splints | Stress fracture |
|---|---|---|
| Where it is tender | A longer stretch along the inner edge of the shin bone, usually in its lower part: 5 cm or more, often a hand-width or longer. Pressing along it finds a band of soreness rather than one point. | One spot on the bone, often small enough to cover with a fingertip. A short, focused patch of tenderness raises the question even when it is not quite pinpoint. |
| How it behaves on a run | Usually starts as an ache brought on by running that settles with rest. If training carries on unchanged, it can last longer after each run and come on sooner. | Stays in one spot on the bone. As it progresses, it comes on earlier in each run, lingers afterwards and then hurts with ordinary walking, which goes with a more severe bone stress injury. |
| Walking, rest and night | Usually settles with rest, and everyday walking is often comfortable. | As it progresses, it can hurt with ordinary walking, at rest or at night. Any of these means stopping running and getting it checked. |
| Hopping on the leg (checked in clinic) | Hopping may ache along the sore stretch. A painful hop alone does not mean a fracture: in one study it also hurt in many shins without a bone stress injury. | Hopping often brings on sharp pain at the one spot, and some people cannot finish the hops. Please do not test this at home. |
| What sets it off | A rise in running or jumping that the shin has not adapted to yet, a change of surface or shoes, or a return after time off. Common in runners and jumping-sport athletes. | The same kind of training rise, plus factors linked with bone stress injury: a previous stress fracture, not eating enough for the training you do (low energy availability), missed or irregular periods, or low bone density. Under-fuelling affects men too. |
| What imaging shows | Usually recognised from the history and examination without a scan. Scans may show mild changes along the bone's outer lining, and similar changes turn up in some people without pain, so they are read alongside the exam. | X-rays are often normal in the first weeks and can stay normal. A magnetic resonance imaging (MRI) scan is the most accurate test and can show bone stress before a crack appears. I cannot order imaging; when it would change the plan, I flag it to your family doctor or sports medicine physician and refer you. |
| Sites that need a doctor sooner | It sits along the inner edge of the shin. A tender spot on the front of the shin is not the usual shin splints pattern and needs your family doctor promptly. | Stress fractures on the inner back edge of the shin bone are lower risk and usually heal with protected loading. A spot on the front of the shin needs your family doctor promptly, and groin, front-of-hip or front-of-thigh pain in a runner needs medical assessment today, because those sites can heal poorly. |
| How long it takes | Mild cases caught early often settle within a few weeks with reduced running and calf strengthening. Cases that have built up over months can take a few months before full running returns. | Many low-risk stress fractures, such as those on the inner back edge of the shin bone, settle over roughly 6 to 8 weeks of protected loading (less walking and impact, sometimes crutches or a boot, as the treating clinician directs), with a graded return to running over the following 4 to 8 weeks. Before running starts again, a 2024 review of return-to-running advice points to five checks: the bone no longer tender, pain-free walking, healing confirmed on imaging for a high-risk fracture, strength and loading tests, and a look at what contributed (George et al., 2024). High-risk sites often take longer and follow your doctor's plan. |
A longer stretch along the inner edge of the shin bone, usually in its lower part: 5 cm or more, often a hand-width or longer. Pressing along it finds a band of soreness rather than one point.
One spot on the bone, often small enough to cover with a fingertip. A short, focused patch of tenderness raises the question even when it is not quite pinpoint.
Usually starts as an ache brought on by running that settles with rest. If training carries on unchanged, it can last longer after each run and come on sooner.
Stays in one spot on the bone. As it progresses, it comes on earlier in each run, lingers afterwards and then hurts with ordinary walking, which goes with a more severe bone stress injury.
Usually settles with rest, and everyday walking is often comfortable.
As it progresses, it can hurt with ordinary walking, at rest or at night. Any of these means stopping running and getting it checked.
Hopping may ache along the sore stretch. A painful hop alone does not mean a fracture: in one study it also hurt in many shins without a bone stress injury.
Hopping often brings on sharp pain at the one spot, and some people cannot finish the hops. Please do not test this at home.
A rise in running or jumping that the shin has not adapted to yet, a change of surface or shoes, or a return after time off. Common in runners and jumping-sport athletes.
The same kind of training rise, plus factors linked with bone stress injury: a previous stress fracture, not eating enough for the training you do (low energy availability), missed or irregular periods, or low bone density. Under-fuelling affects men too.
Usually recognised from the history and examination without a scan. Scans may show mild changes along the bone's outer lining, and similar changes turn up in some people without pain, so they are read alongside the exam.
X-rays are often normal in the first weeks and can stay normal. A magnetic resonance imaging (MRI) scan is the most accurate test and can show bone stress before a crack appears. I cannot order imaging; when it would change the plan, I flag it to your family doctor or sports medicine physician and refer you.
It sits along the inner edge of the shin. A tender spot on the front of the shin is not the usual shin splints pattern and needs your family doctor promptly.
Stress fractures on the inner back edge of the shin bone are lower risk and usually heal with protected loading. A spot on the front of the shin needs your family doctor promptly, and groin, front-of-hip or front-of-thigh pain in a runner needs medical assessment today, because those sites can heal poorly.
Mild cases caught early often settle within a few weeks with reduced running and calf strengthening. Cases that have built up over months can take a few months before full running returns.
Many low-risk stress fractures, such as those on the inner back edge of the shin bone, settle over roughly 6 to 8 weeks of protected loading (less walking and impact, sometimes crutches or a boot, as the treating clinician directs), with a graded return to running over the following 4 to 8 weeks. Before running starts again, a 2024 review of return-to-running advice points to five checks: the bone no longer tender, pain-free walking, healing confirmed on imaging for a high-risk fracture, strength and loading tests, and a look at what contributed (George et al., 2024). High-risk sites often take longer and follow your doctor's plan.
These are the clinical tests I actually run in the first visit. You cannot do them all on yourself reliably, but understanding what they look for helps explain how an in-person exam narrows them down.
I press along the inner edge and the front of the shin to map where it is tender. Soreness spread over 5 cm or more fits shin splints. One tender spot on the bone, or a shorter, focused patch, points toward a bone stress injury, and any tender spot on the front of the shin bone needs a doctor.
When it is safe to try, I ask for a few gentle hops on the sore leg. Sharp pain at one spot, or not being able to hop, raises the suspicion of a stress fracture. A pain-free hop makes a more severe bone stress injury less likely but does not rule out a milder one, and a painful hop is not proof on its own. I skip it when walking already hurts or the pain is in the hip or groin.
Rising onto the toes on one leg, again and again, loads the shin. A general ache along the inner edge fits shin splints; sharp pain that gathers at one spot on the bone, or a set cut short by that spot, points toward bone. It also checks the tendon behind the inner ankle bone, which can mimic both.
I ask about recent changes in distance, speed, hills, surfaces and shoes, previous stress fractures, how much you eat for the training you do, your periods, and any known low bone density. A previous stress fracture, irregular or absent periods or under-fuelling make a bone stress injury more likely and lead me to involve your family doctor.
If you also have groin, front-of-hip or front-of-thigh pain, I screen for signs of a stress fracture at the top of the thigh bone (femoral neck) before anything else. If one is suspected, I stop the exam there and send you for medical assessment the same day, with weight kept off the leg.
Plain-language routing. This is not a diagnosis, and real patients often sit between the two, but the language below is a reasonable starting point.
Your pattern more likely fits shin splints if the soreness runs along a longer stretch of the inner edge of the shin bone, pressing finds a band of tenderness rather than one point, the ache comes on with running and settles with rest, so everyday walking is comfortable. It usually follows a rise in running or jumping, a new surface or new shoes. Many runners with this pattern cut back or briefly pause running, strengthen the calf and hip, and rebuild over several weeks.
Read the shin splints pageYour pattern more likely fits a stress fracture if the pain gathers at one spot on the bone that you can cover with a fingertip, builds as the run goes on and lingers afterwards, and has started to hurt with walking, at rest or at night. A previous stress fracture, not eating enough for your training, missed or irregular periods or low bone density make a bone stress injury more likely. This pattern means stopping running and jumping and seeing your family doctor before you run again; please do not hop or run to test it.
Read the stress fracture pageIt is common not to be sure, and the two can blur. I map the tender area along the bone, ask how the pain behaves through a run and afterwards, check a hop and single-leg calf raises when it is safe to, and go through training changes, previous stress fractures, eating and periods. If the picture points to bone, I pause running and jumping. I cannot order imaging; when imaging would change the plan, I flag it to your family doctor or sports medicine physician and refer you. An early X-ray can be normal, so a normal X-ray alone does not clear a suspected stress fracture. While it is being sorted out, exercise that does not bring on the shin pain, such as pool running, can keep your fitness up.
The two can blur into each other. Both come from loading the shin more than it can recover from, they share risk factors, and researchers still debate whether shin splints and a stress fracture are points on one scale of bone overload or two separate problems. In practice I watch the direction of travel: shin soreness that keeps climbing from week to week, or narrows to one spot, needs reassessment rather than an assumption that it is still shin splints. Other lower leg injuries are also common alongside shin splints, so I check the whole lower leg rather than stopping at the first sore spot.
You can notice the pattern, but you cannot confirm either one yourself. Press gently along the shin: soreness spread along a longer stretch of the inner edge fits shin splints, while one spot on the bone that you can cover with a fingertip fits a stress fracture. Notice whether it now hurts with ordinary walking, at rest or at night, which points more to the bone. Do not hop over and over or go for a run to see whether it still hurts. Pain at one spot, or pain with walking, at rest or at night, means stopping running and seeing your family doctor before you run again.
In clinic, when it is safe to try, I ask you to hop a few times on the sore leg. Sharp pain at one spot on the bone, or not being able to hop, raises the suspicion of a stress fracture, and in a study of military recruits, a painful hop on top of shin pain and tenderness went with more stress fractures. It is not a verdict on its own. In teenage athletes checked with an MRI the same day, hopping also hurt in many shins without a bone stress injury, and some injuries did not hurt on hopping, although a hop that did not hurt made a more severe injury less likely. I read it alongside the rest of the exam, and I skip it when walking already hurts or the pain is in the hip or groin. Please do not test it at home.
No. X-rays often look normal in the first two to three weeks of a stress fracture and can stay normal even when one is there. MRI is the most accurate scan and can show bone stress before a crack appears. A normal X-ray does not clear you to load a suspected stress fracture; follow the treating clinician's investigation and protection plan. I cannot order imaging; when imaging would change the plan, I flag it to your family doctor or sports medicine physician and refer you.
With shin splints, often yes in a reduced form. Many runners cut back or briefly pause, cross-train, strengthen the calf and hip, and rebuild in small steps, as long as the pain is settling rather than climbing from week to week. With a suspected stress fracture, no: running through it usually makes it worse. Stop running and jumping and get it checked; once it is diagnosed, cycling or pool running can keep your fitness up if they do not bring on the pain. Sudden severe pain, a crack, or being unable to put weight on a leg that was already sore means going to emergency or urgent care now for an X-ray.
Mild shin splints caught early often settle within a few weeks with reduced running and calf strengthening; cases that have built up over months can take a few months before full running returns. Many low-risk stress fractures, such as those on the inner back edge of the shin bone, settle over roughly 6 to 8 weeks of protected loading, followed by a graded return to running over another 4 to 8 weeks. High-risk sites, such as the front of the shin and the femoral neck, often take longer and follow your doctor's plan, and recovery from a bone stress injury tends to take longer when it looks more severe on MRI or bone density is low. Changing the training that set it off may help lower the chance of it coming back.
Yes. Tightness, numbness or a slapping foot that comes on at the same point in every run and settles within minutes of stopping can be exertional compartment syndrome; see your family doctor, who can refer you for testing. Pain behind the inner ankle bone that runs up the calf can come from a tendon, and burning or tingling along the leg points more to a nerve or the lower back. If a tight, very painful lower leg keeps getting worse after you stop, numbness and weakness do not wear off, or the foot turns cold, pale or blue, go to emergency now.
Sources I lean on when separating these two conditions in clinic.
In 429 infantry recruits followed through 14 weeks of basic training, stress fractures of the inner shin were more common when hopping on the leg hurt as well as the shin being painful and tender. The stress fractures found had tenderness along 10 cm of bone or less, and how much the shin hurt did not predict which recruits had one.
Milgrom C, Zloczower E, Fleischmann C, et al. "Medial tibial stress fracture diagnosis and treatment guidelines." J Sci Med Sport 2021; 24(6): 526-530.
In 80 teenage athletes with more than a week of shin pain, each checked against an MRI on the same day, no single clinical test or combination was good at both picking up bone stress injuries of the shin and correctly clearing shins without one. Pain on a single-leg hop picked up the most, but it also hurt in many shins without an injury. When the tests were negative, a more severe bone stress injury was unlikely, and the authors concluded that the examination alone cannot be relied on to judge how severe one is.
Nussbaum ED, Gatt CJ Jr, Bjornarra J, Yang C. "Evaluating the Clinical Tests for Adolescent Tibial Bone Stress Injuries." Sports Health 2021; 13(5): 502-510.
A review of imaging studies in people with suspected stress fractures of the leg and foot found MRI the most accurate scan. Plain X-rays often missed stress fractures when people were first seen, particularly early on, and in some cases did not show an existing stress fracture at any point.
Wright AA, Hegedus EJ, Lenchik L, et al. "Diagnostic Accuracy of Various Imaging Modalities for Suspected Lower Extremity Stress Fractures: A Systematic Review With Evidence-Based Recommendations for Clinical Practice." Am J Sports Med 2016; 44(1): 255-263.
Most stress fractures in athletes are diagnosed mainly from the history and examination and recover well with relative rest and a gradual return to activity. A smaller group at higher-risk sites, including the side of the femoral neck that is pulled apart under load (the tension side) and the front of the shin, carries a greater risk of the crack spreading, slow healing or not healing. These need imaging more often, a period without weight on the leg and a slower return, and some may need surgery.
McInnis KC, Ramey LN. "High-Risk Stress Fractures: Diagnosis and Management." PM R 2016; 8(3 Suppl): S113-S124.
In 239 female college athletes from 16 sports, those at moderate or high risk on a published female athlete triad risk score (which brings together energy availability, periods and bone health) were more likely to go on to a bone stress injury. Irregular or absent periods and a previous stress fracture or stress reaction each predicted a later bone stress injury in their own right, and cross-country runners had most of the injuries.
Tenforde AS, Carlson JL, Chang A, et al. "Association of the Female Athlete Triad Risk Assessment Stratification to the Development of Bone Stress Injuries in Collegiate Athletes." Am J Sports Med 2017; 45(2): 302-310.
In 14 runners with 18 painful shins, scanned within 10 days, magnetic resonance imaging showed a range of grades, from swelling of the bone lining, to changes inside the bone, to a stress fracture. Each leg was scanned once, so the study shows grades of injury rather than one leg moving from one to the next. Pain with ordinary walking, one tender spot on the shin and pain when the bone was tapped went with the more severe injuries.
Fredericson M, Bergman AG, Hoffman KL, Dillingham MS. "Tibial stress reaction in runners. Correlation of clinical symptoms and scintigraphy with a new magnetic resonance imaging grading system." Am J Sports Med 1995; 23(4): 472-481.
A clinical summary describes shin splints (medial tibial stress syndrome) as exercise-related pain along the inner edge of the shin that usually starts as mild discomfort with activity and can become more persistent if training carries on unchanged.
Larson A, McClure CJ, May T, Oh R. "Medial Tibial Stress Syndrome." StatPearls. Treasure Island (FL): StatPearls Publishing; 2025.
A review of 50 studies on returning to running after a stress injury of the shin bone grouped the advice into five checks before running starts: the bone no longer tender, pain-free walking, healing confirmed on imaging for high-risk injuries, strength, function and loading tests, and the factors that contributed. Most of the advice rests on low-level evidence, so it guides the decision rather than setting fixed rules.
George ERM, Sheerin KR, Reid D. "Criteria and Guidelines for Returning to Running Following a Tibial Bone Stress Injury: A Scoping Review." Sports Med 2024; 54(9): 2247-2265.
If this page has helped you narrow things down, or if it has left you wanting a proper exam, I see patients at Endorphins Health & Wellness Centre in Burlington. Direct insurance billing is available, and a physician referral is not required.
Burlington hours
