The calf is made up of two muscles — the larger gastrocnemius and the deeper soleus — which join together to form the Achilles tendon that anchors into the heel. In some people the gastrocnemius is simply too tight. Because it crosses the knee, ankle and (indirectly) the foot, that tightness pulls on everything downstream.

A tight calf is a well-recognised driver of several painful foot and ankle conditions, and releasing it can help to:

• Relieve heel and arch pain such as plantar fasciitis — by reducing the constant pull on the plantar fascia that causes plantar fasciitis.
• Settle Achilles tendon pain — by taking tension off an overloaded, painful Achilles tendon (tendinopathy).
• Support the flat foot — tight calves often accompany and drive a collapsing arch, and lengthening the calf is a routine part of flatfoot correction.
• Offload the ball of the foot — easing forefoot overload and metatarsalgia, where too much pressure is driven through the front of the foot.

The main benefit is pain relief and improved function when simpler treatments have not worked. Because the operation is small and generally well tolerated, it is also frequently combined with larger reconstructions — for example flatfoot surgery or a total ankle replacement — to protect the result and help the foot sit and move more naturally.

A little preparation makes the first couple of weeks much easier. Before your operation you will usually attend a pre-assessment appointment to check that you are fit for surgery and to review your medication. If you smoke, stopping (even for a few weeks) meaningfully improves wound healing.

Getting your home ready

You will spend the first few days resting with the leg raised, so it helps to sort a few things out in advance:

• A foam leg-elevation wedge — keeping the foot above the level of the heart reduces swelling and throbbing, and is far more comfortable than a stack of pillows.
• A waterproof cast/dressing protector (for example a LimbO) — this lets you shower without soaking the dressing, which must be kept clean and dry. The bandage for this operation crosses the knee, so it needs to be a long leg waterproof cast.
• Comfortable, loose clothing, easy meals prepared ahead, and a clear path around the home for crutches.

For more detail on getting ready and on the small items that make recovery easier, see the guides below:

• Preparing for foot surgery (patient leaflet)
• Recommended products guide

The goal is simple: to lengthen the tight calf so that it no longer pulls excessively on the Achilles tendon, heel and forefoot. The operation is often described as a gastrocnemius release or recession.

Through a small 3cm horizontal incision at the back of the calf — just below the knee, the tough fibrous sheet (fascia) covering the gastrocnemius is carefully divided. Releasing this layer allows the muscle to lengthen by a small, controlled amount. The underlying muscle fibres and the deeper soleus are left intact, so overall strength is preserved.

It can be carried out under either local or general anaesthetic. Where the release is being done as part of a bigger operation — such as a flatfoot reconstruction or an ankle replacement — it is simply one step within that longer procedure, and the anaesthetic is planned around the main operation.

When performed on its own, a gastrocnemius release is a day-case procedure. That means you come in on the morning of surgery and go home the same day, usually within a few hours of waking up, once you are comfortable, have had something to eat and drink, and the team is happy with your leg.

You will need a responsible adult to drive you home and to stay with you for the first 24 hours. If the calf release is part of a larger reconstruction, your overall stay will follow that of the main operation, which your surgical team will explain beforehand.

Recovery is usually straightforward, and most people are pleasantly surprised by how mobile they are early on. The key to a good outcome is walking on it early, otherwise it will scar in the same position and won’t lengthen. The timeline below applies when the release is done on its own. When it is part of a larger operation, your recovery follows the protocol for that main procedure — Mr Welck will give you the specific plan for your condition.

Early phase — the first 2 weeks

• You can usually put weight through the leg soon after surgery. Expect to use crutches for around the first 3 days for confidence, comfort, pain relief and balance, then gradually wean off them after 3 days, from 2 to 1 to no crutches as soon as you are able.
• Keep the leg elevated as much as possible to control swelling, and keep the dressing clean and dry.
• A night splint may be advised for up to six weeks to hold the calf gently stretched while you sleep.
• Discomfort is usually mild and can be managed with simple over-the-counter pain relief.

Mid-term — 2 to 6 weeks

• At your 2-week review, the wound is checked and the bulky dressing is usually reduced to a small, simple dressing.
• Physiotherapy begins at this stage. Gentle calf-stretching is an essential part of recovery — it is what unlocks the full benefit of the operation — and your physiotherapist will guide you on how far and how often to stretch.
• The calf often feels tight or stretched for a few weeks; this is expected and settles.
• Most people return to desk-based work within 1–2 weeks; a physically demanding job may need longer.

Longer term — 6 weeks and beyond

• Strength and a normal walking pattern return steadily over the following weeks and months.
• Strenuous exercise, including swimming, is best avoided until your consultant has reviewed you and is happy for you to build back up.
• Return to running and sport is staged, and depends on your progress and on whether any other surgery was done at the same time.

The exact pace of your recovery depends on your specific diagnosis and on any procedures performed alongside the release. Your surgeon and physiotherapist will tailor the post-operative protocol to your condition — for example plantar fasciitis, Achilles tendinopathy, flatfoot reconstruction or ankle replacement — and this individual plan takes priority over any general timeline.

Gastrocnemius release is a small, well-established operation with a good safety record, but as with any surgery there are risks. The main procedure-specific ones are:

• Nerve irritation. Small sensory nerves run close to the calf and can be gently stretched during the release. This can cause temporary numbness or tingling. Studies suggest this affects around 5% of patients and usually settles within six to eight weeks.
• Blood clots / DVT. Calf surgery has a higher risk of this than other surgeries so Mr Welck routinely gives tablet blood thinners for this surgery for 6 weeks.
• Permanent nerve damage. Much less common, but a small risk of lasting altered sensation exists.
• Over-lengthening / calf weakness. Rarely, the calf can feel a little weak when pushing off; careful, measured release makes this uncommon.
• Scar and wound issues. The scar is small but, as with any incision, there is a small risk of a tender scar or wound-healing problems.

The general risks common to foot and ankle surgery — including infection, bleeding, blood clots (deep vein thrombosis) and the risks of anaesthesia — are covered in detail in the leaflets below. Please read the one relevant to your operation:

• Guide to hindfoot surgery risks

Mr Matthew Welck is a Consultant Orthopaedic Foot & Ankle Surgeon at the Royal National Orthopaedic Hospital (RNOH), Stanmore, and Honorary Associate Clinical Professor at UCL. He treats patients across London and North London, and is regarded among the leading foot and ankle surgeons in the region.

His specialist practice covers sports injuries, complex hindfoot and flatfoot reconstruction, cavus foot correction, and total ankle replacement, supported by more than 50 peer-reviewed publications and international teaching. To arrange a consultation, please visit matthewwelck.com.