Why is my Achilles still sore after months of rest?

You stopped running. You stopped the gym. Three months on, the tendon is still thick, still sore in the mornings, and still complains on stairs. Rest was the obvious thing to try, and it is the one thing that reliably does not work.

A worn tendon is not an inflamed one

The name has changed for a reason. Achilles tendinitis implied inflammation, and inflammation is what rest and anti-inflammatories are for. What is actually happening in a long-standing sore Achilles is closer to wear: the fibres of the tendon become disorganised and the tissue thickens, without much inflammation at all. That is why it is now called tendinopathy, and why the treatment is the opposite of what most people assume.

Tendon tissue remodels in response to load. Take the load away entirely and the tendon gets weaker, the calf wastes, and the moment you go back to normal walking the pain returns — often worse than before, because there is now less tendon to do the job.

Where it hurts changes the treatment

There are two patterns and they behave differently. Pain in the middle of the tendon, a few centimetres above the heel bone, is mid-portion tendinopathy. Pain right at the back of the heel where the tendon attaches, often with a bony bump and pain from the counter of a shoe, is insertional. The loading exercises differ between them — heel drops off a step suit mid-portion disease but can aggravate insertional disease, which usually does better working on flat ground.

That distinction is the most common reason a home exercise programme found online has not worked. The right exercise for the wrong pattern feels like a treatment failure.

You do not have to stop

Most people can keep running, walking or playing at a reduced level while the tendon recovers, rather than stopping altogether and losing months. What that reduced level looks like is worked out for you and adjusted as the tendon improves, which is why a supervised programme is worth the trouble.

How long it honestly takes

Three to six months of consistent loading, sometimes longer. That is a real timeframe, not a hedge — tendon remodels slowly and there is no way to hurry it. Morning stiffness is usually the last symptom to leave, so judge progress by what you can do rather than by whether the first few steps still feel tight.

If nothing has changed after three months of a genuinely supervised programme, that is the point to have the plan reviewed rather than to keep going in hope.

Why not just have a steroid injection?

Steroid weakens tendon tissue, and injecting it into the Achilles has caused ruptures. It is not put into the tendon itself. The injections used around the tendon are a different thing: hydrodilatation, a high-volume injection of fluid placed in front of the tendon with only a trace amount of steroid, for mid-portion disease, or occasionally an injection into the inflamed bursa in insertional disease, both under ultrasound guidance. They sit alongside a loading programme rather than replacing it.

When it is worth being assessed

Book a review if the pain has not shifted after about three months of proper loading, if the tendon is visibly thickened or has a tender lump, if it is waking you at night, or if you felt a sudden snap and cannot push off properly — that last one is a possible rupture and needs assessment promptly, not a rest and review.

Key points

• Tendinopathy is wear rather than inflammation, so rest and anti-inflammatories do not fix it.

• Tendons need graded load to recover; the aim is to find a level they tolerate and build from there.

• Mid-portion and insertional disease need different exercises — the wrong programme looks like failure.

• You usually do not have to stop altogether — a reduced level of activity is part of the treatment.

• Expect three to six months; morning stiffness goes last. Steroid is not injected into the tendon.

More detail. Want the full picture, including when surgery is considered? Achilles Tendinopathy covers both patterns, the injections, the operations and the recovery timeline.

Ready to discuss your treatment options?

Book a consultation with Dr Janan Chandrananth to have your Achilles assessed and a loading programme set up that suits the pattern you have.