In short. Difficulty breathing, chest pain, bleeding that will not stop, a leg more swollen and warm than the other, and confusion: the findings that mean emergency care now.
Key points
- What makes the emergency tier worth learning is that none of its items is dramatic when it begins.
- A calf slightly more swollen than the other side.
- Breathlessness put down to being unfit after a week in bed.
The emergency tier is short, and it is deliberately not a list of the most painful things that can happen after an operation. It is the list of findings that are dangerous now and are frequently quiet when acting is easiest. Every item on it appears away from the wound, which is why a patient watching the incision will not see any of them coming.
Difficulty breathing, chest pain, or coughing blood
Breathlessness that is new or worsening, pain in the chest, and blood in what you cough up belong together because they can be one problem: a clot that has travelled to the lungs after forming in the veins of the legs or the pelvis. It is uncommon, which is why breathlessness after an operation is never treated as a matter of fitness. It gives no notice.
Bleeding that will not stop with firm pressure
Oozing that stains a dressing is ordinary. Bleeding that continues despite firm, sustained pressure applied directly to the wound is not, and neither is bleeding that restarts each time the pressure is released, or that comes with feeling faint, cold or clammy. Press firmly, keep pressing, and travel to an emergency department.
These findings are quiet at the start
What makes the emergency tier worth learning is that none of its items is dramatic when it begins. A calf slightly more swollen than the other side. Breathlessness put down to being unfit after a week in bed. A drowsiness attributed to pain relief. Each is easy to explain away, and each is the moment at which treatment works best.
A leg more swollen, warm and painful than the other
A clot in the deep veins of the leg is one of the complications an operation can set up, and it presents as an asymmetry rather than as a sensation. One calf or thigh is larger, feels warmer, and is tender, often with a tight or heavy quality. Comparing the two legs side by side is the observation, and it is easier to make than to interpret.
Confusion, worsening drowsiness, or a severe headache
A patient who is more drowsy than the medicines explain, who is difficult to rouse, or who is confused about where they are needs emergency care now. So does a severe headache that comes on suddenly, or that is unlike any headache before it. These findings are often noticed by a family member rather than by the patient.
Seek emergency care now if
- Breathing is difficult, there is chest pain, or you cough up blood.
- Bleeding from the wound will not stop with firm pressure, or one leg is more swollen, warm and painful than the other.
- There is confusion, drowsiness that is getting worse, or a severe headache.
Go rather than telephone, and say what operation you had and when as soon as you arrive. This site cannot assess you, and every item on this list is a finding for an emergency department rather than for a page.
Frequently asked questions
Why does a swollen leg after surgery need emergency care?
Because a clot can form in the deep veins of a leg after an operation, and the risk is not the leg itself but where the clot can travel. A calf or thigh that is larger, warmer and more tender than the other side is the usual presentation. It is treated as an emergency rather than a same-day matter because a clot that moves to the lungs is a different order of problem.
How much bleeding from a wound is too much?
Oozing that stains a dressing is ordinary. The finding that matters is bleeding that continues despite firm, sustained pressure applied directly to the wound, bleeding that restarts each time the pressure is released, or bleeding accompanied by feeling faint, cold or clammy. Press firmly, keep pressing, and get to an emergency department rather than changing dressings at home.
Can a clot in the lung appear after I have already gone home?
Yes. It can appear in the first days after an operation or in the weeks after discharge, and it does not require any warning beforehand. That is why new or worsening breathlessness, chest pain, and blood in what you cough up are treated as an emergency at any point in the recovery rather than only while you are still in hospital.
Risks & Limitations
- Every operation carries risk, and no outcome can be guaranteed.
- Scars after surgery are permanent. They mature over 6–12 months but do not disappear.
- Final results are judged at 6–12 months, not in the first weeks.
- Infection, bleeding, a collection of fluid and a clot in the leg are uncommon, and they are the complications this site is about.
- Further surgery, including revision, may be needed, and it is not a reset.
- Recovery times vary between people, and the intervals given here are honest ranges rather than promises.
When to Seek Care
- Difficulty breathing or chest pain — seek emergency care immediately.
- Bleeding from a wound that does not stop with firm pressure.
- A leg more swollen, warm and painful than the other, or confusion or worsening drowsiness.
- Fever with spreading redness, warmth, pus or a foul discharge — same-day assessment.
- Pain that is worsening rather than easing, or a wound that has opened.
References & Further Reading
- American Society of Plastic Surgeons (ASPS) — procedure and safety guidance
- National Institute for Health and Care Excellence (NICE, UK) — relevant guidance
- Cochrane Library — systematic reviews
- Chinese Medical Association Plastic Surgery Branch — clinical guidance
This page is patient education, not medical advice, and it does not cite individual studies. Discuss your own case with a qualified clinician. To arrange an assessment at Chongqing West District Hospital, see Contact & Consultation.