In short. Why compression is prescribed after many operations, how long garments are worn, how to wear them comfortably, and what happens when they are left off.
Key points
- Much of the fluid that collects does so overnight, when you are lying still and not moving around.
- A garment worn all day but removed at night is working during the hours when it is needed least.
- If it is uncomfortable at night, say so and ask about a different size or design rather than quietly leaving it off.
Compression is one of the least glamorous parts of recovery and one of the most important. It is usually prescribed for a reason, and wearing it is not optional in the way that many other instructions are.
What compression does
A compression garment or dressing applies steady, even pressure to the tissue underneath. That pressure reduces the space available for fluid to collect, so swelling resolves faster. It supports the tissue layers while they bond to one another, which reduces the chance of a pocket of fluid forming and hardening. It limits the small shearing movements between layers that encourage bleeding and prolong bruising. And in scar management it reduces tension across a healing wound, which is one of the factors that makes a scar widen.
How long it is worn
Duration is decided by your surgeon and depends on the operation. Common patterns run from continuous wear for the first days, through wearing it day and night for a number of weeks, to wearing it by day only as swelling settles. Facial surgery may involve a supportive dressing or a chin strap rather than a full garment; body surgery usually involves a fitted garment covering the treated area. Because the prescription is individual, the answer to how long is the answer written in your own instructions.
Wear it as prescribed, including at night
Much of the fluid that collects does so overnight, when you are lying still and not moving around. A garment worn all day but removed at night is working during the hours when it is needed least. If it is uncomfortable at night, say so and ask about a different size or design rather than quietly leaving it off.
Wearing it well
A garment that is too tight is dangerous and a garment that is too loose does nothing. It should feel firm and even, without pinching, rolling, cutting in or leaving deep grooves, and without numbness, tingling or colour change in the skin beyond it. Keep the skin underneath clean and dry, and check it regularly for redness or broken areas, particularly over bony points. Many garments can be hand washed and worn again, and it is worth having a second one so that one is always available.
What happens if it is not worn
Leaving a garment off does not usually produce a dramatic failure. It produces a slower, less even recovery: more swelling that lasts longer, a greater chance of fluid collecting and hardening in a pocket, more prolonged bruising, and a higher chance that a scar widens. In the worst case, a collection of fluid needs to be drained with a needle. That is a cumulative cost measured over weeks, which is precisely why it is so easy to underestimate on any single day.
Contact your team if
- The garment causes numbness, tingling, bluish colour change or severe pain, or the skin beneath it breaks down.
- A hard, tender swelling appears despite compression, or the area becomes markedly more painful.
- The garment is damaged, lost, or no longer fits — ask for a replacement rather than going without.
Compression is a treatment, not a garment. Wear it as it was prescribed, keep the skin underneath healthy, and raise any problem with it early rather than abandoning it.
Frequently asked questions
Why is compression prescribed after surgery?
It applies steady, even pressure. That reduces the space available for fluid to collect, supports the tissue layers while they bond, limits the small shearing movements that prolong bruising, and reduces tension across a healing wound so a scar is less likely to widen.
Why must a compression garment be worn at night?
Because much of the fluid that collects does so overnight, when you are lying still. A garment worn all day but removed at night is working during the hours when it is needed least. If it is uncomfortable, ask about a different size.
What happens if I leave my compression garment off?
Usually not a dramatic failure, but a slower and less even recovery: more swelling that lasts longer, a greater chance of fluid collecting and hardening, more prolonged bruising, and a higher chance a scar widens. In the worst case fluid needs draining.
Risks & Limitations
- Recovery takes longer than most patients expect, and the final result of most operations is judged at six to twelve months, once swelling has settled and scars have matured.
- Some swelling, bruising, numbness and discomfort are a normal part of healing rather than a sign that something has gone wrong.
- Scars are permanent, though they mature and usually become softer and less noticeable over twelve to eighteen months.
- Rushing back to activity commonly causes setbacks and costs more time than it saves.
- The written instructions from your own discharging team override any general guidance here, including on dressings, medication, activity and follow-up.
When to Seek Care
- Severe or worsening pain, or a wound that opens or discharges.
- Spreading redness or warmth around the wound, or a fever.
- A swollen, painful calf; chest pain; or breathlessness — seek emergency care immediately.
- Heavy bleeding, or a dressing that is soaked through.
- A flap or graft that turns dark or cold.
- Do not wait for your next appointment for any of these. Contact your own clinical team, and if the problem is severe and you cannot reach them, go to an emergency department.
References & Further Reading
- World Health Organization (WHO) — surgical safety and patient safety resources
- National Institute for Health and Care Excellence (NICE, UK) — guidance on surgical site infection and recovery
- American Society of Plastic Surgeons (ASPS) — patient safety and aftercare guidance
This page is patient education, not medical advice, and it does not cite individual studies. It cannot replace the instructions given to you by the team that performed your operation. Discuss your own recovery with that team. To contact them, see Contact & Consultation.