A nagging ache in the Achilles, knee, elbow, or wrist tendon that's worse first thing or right at the start of activity, and often eases once you warm up, is a common pattern clinicians call tendinopathy. This page is the map: what tends to be going on, what genuinely needs checking, where to start, and which guide to read for your particular version of it.
The short version
- Tendon pain (tendinopathy) is rarely about inflammation alone — it's more about a tendon struggling to keep up with load.
- Complete rest tends to make tendons weaker and less tolerant, not more resilient.
- Gentle, progressive loading is the best-supported approach. Isometric holds are one reasonable way to start, but they suit some people more than others — they're not automatically better than other strengthening.
- Tendons are slow healers, so patience and consistency matter more than quick fixes.
What most tendon pain actually is
Tendinopathy is the general term for ongoing tendon pain — most often at the Achilles, the patellar tendon below the kneecap, the elbow tendons, the rotator cuff, or the wrist and thumb tendons. Despite older names like "tendinitis" (which implies inflammation), most persistent tendon pain isn't primarily an inflammatory problem. It's more that the tendon's structure hasn't kept pace with the demands placed on it.
Think of a tendon as a rope that transmits force from muscle to bone. When it's asked to do more than it currently tolerates — a sudden increase in activity, a new sport, or simply the wear of time — it can become painful and less capable, without necessarily being torn or seriously damaged.
Full rest can feel like the responsible choice, but tendons respond to load — that's literally how they stay strong. Taking load away for too long can leave the tendon deconditioned, so it copes even less well once you go back to normal activity. The alternative that tends to work better is calibrated loading: a manageable, tolerable amount of work, building gradually from there.
⚠️ When to get it looked at in person
If you are taking an antibiotic — especially ciprofloxacin, levofloxacin or ofloxacin — and you get new tendon pain or swelling, stop taking it and contact the doctor who prescribed it straight away. These antibiotics can weaken tendons. Do not start the exercises on this page until you've spoken to them. The same applies if you've recently had a steroid injection into or near the tendon, or take steroid tablets.
Get seen urgently if there's a sudden, sharp pain with a "pop" or a feeling of giving way (a possible tendon rupture), significant swelling, redness, heat, or fever, or if you can't bear weight or use the limb normally.
Get medical help the same day if one calf becomes swollen, warm, tender or red compared with the other, even without a fever — that pattern needs ruling out as a blood clot before you load the leg.
- Book an appointment if you have numbness, weakness, or pins and needles
- Book an appointment if the pain is severe or rapidly worsening
- Book an appointment if it doesn't clearly ease with sensible loading over several weeks
Worth mentioning: tendon pain in several places at once, morning stiffness lasting 30 minutes or more, or tendon pain alongside psoriasis or gut symptoms — that pattern is assessed differently, so mention it when you get checked.
Everyday morning stiffness or activity-related tendon ache with none of these is far less concerning.
Find your version of it
Tendon pain behaves differently depending on where it is and what sets it off. Pick whichever sounds most like yours.
Achilles and lower leg
- Achilles pain in the morning — why those first steps hurt, and what it means.
- Tendon pain after running — what it means and what to do.
The loading approach, explained
- Isometric exercises for tendon pain — what they do, what they don't do, and why they're often the starting point.
Wrist and hands
- Wrist and thumb pain after having a baby (De Quervain's) — a common tendon problem with its own specific pattern and fixes.
Where to start, whichever version you have
The common thread across all of them is the same: tolerable load, not zero load. These are worth learning properly first.
Push or hold against a still resistance near the sore tendon. A steady hold that some people find eases the pain — a reasonable way to start, not a required one.
Rise up and lower down over 3–4 seconds each way. A gentle, well-studied starting point for Achilles and calf tendons. Full instructions.
Add a light band or weight to the affected joint's main movement. Builds capacity in the exact direction the tendon needs.
Move the joint through a full, easy range before loading it. Helps the area feel ready before you ask more of it.
Some mild discomfort during exercise can be normal for tendons, but sharp pain or a spike the next morning means you've asked a bit too much — ease back slightly and rebuild.
How long it takes
Tendons adapt more slowly than muscle — think weeks to months, not days. Many people start feeling meaningful improvement over several weeks of consistent, gradually progressed loading, with fuller recovery often taking a few months. Progress by small increments — a little more resistance, a few more reps, a slightly faster tempo — rather than big jumps.
The bottom line
Tendon pain usually responds better to smart, gradual loading than to complete rest. Find the guide above that matches yours, start with tolerable exercises, progress steadily, and give it the time tendons genuinely need. Get it looked at in person if there's a sudden "pop," significant swelling, or numbness.