What are the signs of deep vein thrombosis?

Pain, swelling, red: Only about 50% of people with blood clots have symptoms directly related to that blood clot. The most common symptoms, when you have them, are pain, swelling, redness and increased warmth over the vessel involved. Occasionally, trouble breathing and pain in the chest are the first signs - which can happen if part of a 'silent clot' breaks off and travels to the lungs.

Pain and swelling: The most common symptom of DVT is pain and the most common physical finding is swelling. However, not everyone has these. If you have unexplained swelling with or without calf or thigh pain then a venous ultrasound would be indicated to look for a dvt. Sometimes even a ct scan or mrv is necessary. The bottom line is, if DVT is considered, then proper testing is required.

Dvt: Swelling, discomfort, heaviness, of the extremity involved the symptoms would be acute in nature, and could be as result of a trauma, or recent airplane travel.