By Luther Chiew (Physiotherapist)
Premier Sports Medicine
In runners, the most common cause is shin splints, but bone stress injuries, muscle overload and a few less common problems can cause very similar pain. Identifying the cause of shin pain involves how much load your lower leg is handling, where the pain sits, and how it behaves during and after a run.
Need help with recurring running pain? See our Running Injury Clinic assessment and treatment.
Your next step depends on the pattern of pain, the training changes that came before it, and whether any warning signs point to a problem that needs prompt assessment.
Why do you get shin pain?
If your shin hurts when you run, the pain is usually coming from repeated overload of bone, muscle, tendon or the connective tissue around the shin. In plain terms, your lower leg is doing more than it is currently ready for.
For most runners, the most common cause of shin pain is shin splints, also called medial tibial stress syndrome. This usually feels like an ache along the inner border of the shin bone. However, a sore shin can also reflect an early bone stress reaction, a stress fracture, overloaded calf or posterior tibialis muscles, or a less common issue such as exertional compartment syndrome.
Those conditions do not all behave the same way. They are also treated differently. Some settle well with a load change and progressive rehab. Others get worse if you keep pushing. This article is to help you recognise patterns, but it is not a substitute for an individual assessment if your symptoms are severe, persistent or unusual.
The most common causes of shin pain in runners
Shin splints: medial tibial stress syndrome
Shin splints presents itself as irritation along the inner edge of your tibia, the large shin bone. The area that gets sore is usually broad rather than pinpoint, often spread over several centimetres along the lower to middle inner shin. This problem is strongly linked to repetitive loading from running and jumping, especially after increases in training volume or intensity.
The pain pattern is fairly consistent. Your shin often feels stiff or achy at the start of a run, warms up a bit, then returns after the session or the next morning. Pressing along the inner shin usually feels tender over a wider area, not one exact spot.
Bone stress reaction or stress fracture
A bone stress injury sits on a spectrum. Early on, the bone becomes irritated from repeated loading. That stage is often called a stress reaction. If the loading continues and the bone cannot recover, the injury progresses to a stress fracture.
This pain is usually more localised than shin splints. Instead of a broad ache, you feel one small bony spot that is clearly tender. Pain tends to build with impact, settle less easily, and in more advanced cases can hurt with hopping, brisk walking, or even at rest. Bone stress injuries in runners need respect because continuing to load them can delay healing and increase severity.
Muscle, tendon or fascia overload
Not all shin pain is bone-related. Your calf muscles, tibialis posterior, tibialis anterior and the surrounding fascia can all become overloaded. This often happens after a sudden block of hills, speed work, track sessions, or a quick jump in weekly kilometres.
Soft tissue pain often feels more muscular or tight, and the sore area can sit slightly off the bone rather than directly on it. You may notice it more when pushing off, climbing, descending or running fast. If your symptoms blend into the back of the lower leg or heel, it is also worth understanding how Achilles pain can overlap with lower-leg loading problems.
Signs that need quicker assessment
Some signs deserve faster action. Stop running and arrange an assessment if pain is sharp, worsening, or focused on one exact bony point. The same applies if you limp, cannot hop comfortably, get pain at rest or at night, or notice major swelling, numbness, weakness, fever, or pain after a fall or direct blow.
Those warning signs raise concern for bone stress injury, compartment syndrome, significant soft tissue injury or another condition that needs to be assessed by a professional. If you want a clear guide to those warning signs, this breakdown of pain signs that should make you stop running is useful.
Why shin pain starts: the load and capacity problem
Most shin pain starts because demand rises above capacity. Running places repeated force through your lower leg. If the total load from training, life stress and recovery exceeds what your bone and soft tissue can tolerate, pain starts. That load-capacity model explains why symptoms often start during half marathon prep or after jumping back into running. The biggest trigger is usually a recent spike, usually when weekly mileage increases too quickly or when you return after time off running because of illness, travel or injury. Often times, when your overall running load has crept too high, the pain onset is delayed rather than immediate.
Footwear, surfaces and session type
Shoes do matter, just not in the simplistic way social media often suggests. Old shoes that no longer suit your current training, abrupt changes to a very different shoe, repeated running on hard cambered roads, and a block of downhill or hill sessions can all increase stress on the lower leg.
None of that means changing your shoes will prevent injury. It’s just one piece of the puzzle. If you want to read about this further follow the link to learn about what shoes really can and cannot do for injury risk.
Strength, capacity and recovery
Your calf and lower-leg strength help absorb and produce force with every stride. So does your general running capacity. Recovery matters just as much. Poor sleep, inadequate fuelling, hard training stacked too closely together, and low energy availability all reduce your ability to adapt to load. Bone health also matters, especially if your training volume is high or your recovery is inconsistent. It is vital to hit a balance between your training demands and what your body is ready to handle.
Can you keep running with shin pain?
Sometimes, after the cause has been assessed and bone stress injury has been excluded. If pain is mild, stable, spread over a broader area, and does not worsen during the run or over the next 24 hours, modified running is often reasonable. That usually means an easier pace, less distance, fewer hills and a close eye on symptom response.
If pain is localised, sharp, worsening, affecting your gait, or present in walking, hopping, rest or night-time, keep running off the table until you have been assessed.
How to reduce the risk of shin pain coming back
Build gradually and keep your easy runs easy
Most flare-ups follow a familiar setup: too much load too soon, often layered across long runs, speed and hills. Build weekly volume gradually, space out harder sessions, and avoid stacking demanding runs when your legs are already carrying fatigue. Easy runs should actually be easy enough to support recovery and adaptation.
Maintain lower-leg strength and running capacity
Once shin pain settles, do not drop the strength work immediately. Ongoing calf and lower-leg loading helps maintain the capacity you built in rehab. So does regular exposure to the type of running you want to handle, whether that is road kilometres, hills, trails or track. A base of simple prevention-focused strength exercises can support your capacity alongside gradual running progression and recovery.
Check the basics: shoes, surfaces and recovery
Replace worn shoes when they no longer suit your training, but avoid dramatic shoe changes overnight. Mix surfaces where practical, especially if you have been doing every run on the same cambered road or hard path. Fuel properly, sleep enough, and respect recovery after races or hard blocks. Those basics sound boring, but they shape tissue tolerance more than most gadgets do.
When to seek professional help
Get individual advice if shin pain lasts more than a short period, keeps flaring whenever you increase training, sits in one exact bony spot, stops you progressing your running, or raises concern about stress fracture or exertional compartment syndrome. Seek prompt medical assessment if pain is severe, present at rest or at night, follows a fall or blow, or comes with swelling, numbness, weakness or limping.
General information can help you recognise patterns, but it cannot tell you exactly what is driving your pain or what level of loading is safe for your situation. That is especially true if you are training for a race, returning from time off, or trying to balance performance goals with an irritated shin.
If you need a structured assessment and plan, this running injury assessment service is the right place to start. If running pain keeps returning or is stopping you from progressing, book a Running Injury Assessment with Premier Sports Medicine.
About the author
Luther Chiew is a physiotherapist at Premier Sports Medicine with an interest in running, sports and overuse injuries. His background includes strength and conditioning, and he holds a Bachelor of Applied Science and a Master of Physiotherapy Practice from La Trobe University.
Read Luther’s practitioner profile.
Clinical content reviewed and approved by Luther Chiew, Physiotherapist.
This article provides general education. An individual assessment may lead to different advice.
