When is GP consultation recommended for deep vein thrombosis?

Deep vein thrombosis is a blood clot in a deep vein, often in the leg. It may cause swelling, tenderness or aching in one limb, with skin that feels warmer or looks different. These signs can have other causes, so an examination and further assessment are needed rather than trying to confirm a clot at home.

Contact a GP service promptly and mention when the symptoms began, whether one leg is affected, and any recent operation, long journey, bed rest, pregnancy, hormone medicine or previous clot. Do not massage the painful area or start someone else’s blood-thinning medicine. Follow the clinician’s instructions about tests and treatment.

Call emergency services immediately if leg symptoms occur with sudden breathlessness, chest pain, coughing blood, faintness, severe weakness or a racing heartbeat. These can indicate that a clot has travelled to the lungs. If you already take an anticoagulant, seek urgent advice for heavy bleeding, black stools, vomiting blood or a serious fall.

Ask which symptoms make a clot more or less likely, whether you need an ultrasound or other test, how quickly results will be available, and what activity is safe while you wait. If treatment is prescribed, ask how to take it, what bleeding signs to watch for, and when follow-up is needed.