Deep vein thrombosis (DVT) occurs when a blood clot (thrombus) forms in one or more of the deep veins in the body, usually in the legs. Deep vein thrombosis can cause leg pain or swelling. Sometimes there are no noticeable symptoms.Blood clot in leg veinA blood clot in a leg vein may cause pain, warmth and tenderness in the affected area.You can get deep vein thrombosis (DVT) if you have certain medical conditions that affect how the blood clots. A blood clot in the legs can also develop if you don't move for a long time. For example, you might not move a lot when traveling a long distance or when you're on bed rest due to surgery, an illness or an accident.Deep vein thrombosis can be serious because blood clots in the veins can break loose. The clots can then travel through the bloodstream and get stuck in the lungs, blocking blood flow (pulmonary embolism). When DVT and pulmonary embolism occur together, it's called venous thromboembolism (VTE).Products & ServicesAssortment of Compression Products at Mayo Clinic StoreBook: Mayo Clinic Family Health Book, 5th EditionNewsletter: Mayo Clinic Health Letter — Digital EditionSymptomsDeep vein thrombosis (DVT) symptoms can include:Leg swellingLeg pain, cramping or soreness that often starts in the calfChange in skin color on the leg — such as red or purple, depending on the color of your skinA feeling of warmth on the affected legDeep vein thrombosis can occur without noticeable symptoms.When to see a doctorIf you develop symptoms of DVT, contact your health care provider.

Carotid artery disease results from a blockage or narrowing of the carotid arteries. This narrowing is also called carotid artery stenosis. The carotid arteries are major blood vessels that provide your brain's blood supply. You have two carotid arteries, one on either side of your neck. The stenosis or narrowing can be corrected either by surgery or endovascular placement of stent. This prevents any major stroke events.

Varicose veins are swollen, twisted blood vessels that bulge just under your skin’s surface. These blue or purple bulges usually appear in your legs, feet and ankles. They can be painful or itchy. Spider veins, which may surround varicose veins, are smaller red or purple lines that appear close to your skin’s surface.Although they can be unsightly and uncomfortable, varicose veins aren’t dangerous for most people. In some cases, severe varicose veins can lead to serious health problems, such as blood clots. You can relieve most varicose vein symptoms with your vascular surgeon who can treat them with injections, laser therapy or surgery.