Aching along the inner edge of the shin that shows up a few weeks into a new running routine, or after moving from the park connector onto pavement. It hurts at the start of a run, sometimes eases in the middle, and is worst afterwards.
Cold after running, warmth before it, and neither one is the treatment. The treatment is how much you’re running and on what.
What shin splints are
The proper name is medial tibial stress syndrome, and it sits on a spectrum. At the mild end, irritation where muscle and connective tissue attach along the shin bone. At the far end, the bone itself is being stressed faster than it can adapt, which is a stress fracture.
That spectrum is why the advice is so insistent about load. It’s also why pain that keeps escalating needs looking at rather than managing.
It shows up after a change: more distance, more frequency, faster sessions, harder surfaces, new or worn-out shoes, or a return after months off. Almost always a change. The same pattern behind IT band and runner’s knee and a stiff Achilles.
Cold or heat?
| When | Which | Why |
|---|---|---|
| Straight after a run, shin sore and tender | Cold, 10–15 minutes | Settles the irritation and the ache |
| Before a run, calves tight | Heat, then warm up properly | Warm tissue moves better |
| Rest days, general tightness | Heat, then stretch and strengthen | Makes the work more comfortable |
| Sharp pain on one small spot of bone | Neither, see a physio | Possible stress fracture |
The general version of that decision: heat or ice: a physio’s decision guide and the 48–72 hour rule.
One caution specific to the shin. There’s very little tissue between skin and bone along the front of the lower leg, so it heats and cools faster than a thigh does. Keep the setting low, 10 minutes, cover on, and put the heat on the calf muscle behind rather than directly on the bony edge. Cold packs go in a thin towel, never straight on the skin.
What actually fixes it
Cut the load, don’t stop entirely. Reduce distance and intensity to the level that doesn’t hurt during or after. Total rest feels responsible and leaves you with the same tolerance you had when it started.
Cross-train while you rebuild: cycling, swimming, the pool. See cycling neck and back pain and swimming neck and shoulder pain if you’re picking those up in a hurry.
Calf strength. Calf raises, straight-leg and bent-knee, built up over weeks to single leg and then loaded. This is the single most useful thing on the list, and expect some soreness early. See heat and weight training.
Check the shoes. Replace them before the sole is flat. Don’t change model and ramp up distance in the same week.
Soften the surface while it settles: track, treadmill, grass, the park connectors rather than pavement.
Build back by about 10% a week, and hold steady weeks in between. Slower than you want, faster than a stress fracture.
The two things this can turn into
A stress fracture. Pain narrowing to one specific spot on the bone that hurts when you press it, pain that comes on earlier in each run, pain hopping, or pain at rest and at night. That needs assessment, not another week of running through it.
Exertional compartment syndrome. Tightness and a building pressure in the lower leg at a predictable point in the run, sometimes with numbness or foot drop, easing within minutes of stopping. Different problem, different treatment, worth naming to a doctor.
Go to A&E for severe, relentless lower leg pain with tightness, numbness or a tense swollen calf, especially after an injury or a hard session. Acute compartment syndrome is an emergency, and a swollen, warm, tender calf can also be a clot. No heat, no massage, get it seen. See calf cramps at night for how an ordinary cramp behaves differently.
See a physio if…
- It hasn’t settled after two or three weeks of reduced running
- Pain is on one small area of bone rather than spread along the inner edge
- It comes back every time you build up, which usually means something in how you load or move needs addressing
- You have numbness, tingling or weakness in the foot
- You’re a woman running high mileage with irregular or absent periods, or you’ve had previous stress fractures. Bone health is worth checking properly.
Related: plantar fasciitis and an old ankle sprain that never got rehabbed, which often sits underneath a recurring lower leg problem.
The heat pad we use
We’ve supplied the Bremed BD7800 since 2010. It holds a steady temperature, covers a whole lower back and has a machine-washable cotton cover. Physiotherapy clinics in Singapore use it with their patients.
Clinically reviewed by: Nigel Chua (Hand Occupational Therapist) & Louise Yow (Physiotherapist). This article is general information, not a diagnosis. electricheatpad.com sells electric heat pads.
