Blood clots, known as Deep Vein Thrombosis (DVT), most commonly form in the deep veins of the calf, thigh, or pelvis in the leg, though they can occur in other deep veins too, blocking blood flow and potentially traveling to the lungs (Pulmonary Embolism).
Deep vein blood clots typically occur in the lower leg or thigh. “Deep vein thrombosis has classic symptoms—for example swelling, pain, warmth, and redness on the leg,” says Dr. Andrei Kindzelski, an NIH blood disease expert.
throbbing pain in 1 leg (rarely both legs), usually in the calf or thigh, when walking or standing up. swelling in 1 leg (rarely both legs) warm skin around the painful area. red or darkened skin around the painful area – this may be harder to see on brown or black skin.
You can check for signs of a blood clot (DVT) at home by looking for swelling, redness, warmth, and pain (like a pulled muscle) in one leg, especially the calf, compared to the other. Gently feel for tenderness or firmness and compare calf size (over 1 inch difference is a concern). However, home checks aren't definitive; seek immediate medical care if you suspect DVT, especially with shortness of breath, as it can be life-threatening.
The swelling can make the skin on the lower leg feel tight. Other possible symptoms include tingling, itching, numbness, muscle cramps, and varicose veins. Rashes and skin discoloration can develop over time: The skin can become inflamed and red.
Discolored (yellowish-brown) skin. Red, scaly or thick patches. Tender or painful areas.
Because the symptoms of DVT are commonly experienced and not necessarily specific to DVT, it is possible to misdiagnose DVT. There have been numerous cases of DVT being misdiagnosed as sciatica, muscle strains or even cramp.
Duplex ultrasonography is an imaging test that uses sound waves to look at the flow of blood in the veins. It can detect blockages or blood clots in the deep veins. It is the standard imaging test to diagnose DVT. A D-dimer blood test measures a substance in the blood that is released when a clot breaks up.
Anticoagulants, such as heparin, warfarin, dabigatran, apixaban, and rivaroxaban, are medications that thin the blood and help to dissolve blood clots.
The five key warning signs of a deep vein blood clot (DVT) often include swelling, pain/tenderness, warmth, redness/discoloration, and sometimes visible veins, usually in one leg or arm, while signs of a pulmonary embolism (PE) like sudden shortness of breath or chest pain are medical emergencies. Recognizing these symptoms early is crucial, as DVT can travel to the lungs, causing a potentially fatal PE.
Don't Ignore These 8 Blood Clot Warning Signs
As a vascular surgeon, I've treated teenagers and men and women well into their 80s. According to the CDC, between 300,000 and 600,000 Americans a year develop a blood clot in a leg or, in rare cases, in an arm.
See a healthcare provider if your leg cramps are unbearably painful, happen frequently or last for a long time. Also, talk to your provider right away if you have any of the following symptoms in addition to leg cramps: Muscle cramps in other parts of your body. Significant pain.
Leg swelling. Leg pain, cramping or soreness that often starts in the calf. Change in skin color on the leg — such as red or purple, depending on the color of your skin. A feeling of warmth on the affected leg.
This process happens incredibly fast. According to Pulmonary Physiology, blood cells typically move through the pulmonary circulation in just four to five seconds, meaning a clot can lodge in the lungs mere moments after detaching. Once in the lungs, the clot can block blood flow, leading to a pulmonary embolism (PE).
However, each person may experience symptoms differently:
Avoid Sitting For Long Periods Of Time
Instead, make sure to get up every now and then and take a walk around. Stretch your legs and even wiggle your toes to help get the circulation flowing again. If you are already suffering from blood clotting, make sure to never cross your legs while sitting down.
What to Expect in the ER
While this sounds like a good thing, it could lead to potentially serious, even fatal problems. A serious problem, known as pulmonary embolism, can occur if a blood clot that has started to dissolve on its own doesn't dissolve completely and instead breaks off from the walls of the veins and travels to the lungs.
Leg symptoms that mimic blood clots (DVT) often include muscle strains, cramps, shin splints, and twisted ankles, but other serious conditions like cellulitis, varicose veins, artery blockages (PAD), Baker's cysts, and superficial thrombophlebitis can also be mistaken for DVT due to similar swelling, redness, warmth, and pain, requiring prompt medical evaluation for proper diagnosis.
The signs and symptoms of a DVT may include but are not limited to:
Blood-thinning medications are commonly used to prevent blood clots from forming or getting bigger. Thrombolytic medications can break up existing clots. Catheter-directed treatments, such as percutaneous transcatheter treatment, are done by inserting a catheter into a blood vessel in the groin.
DVT occurred in 71% of the patients without a pulmonary embolism and in 6% with a pulmonary embolism. The annual risk was 51 per 100 000 for DVT and 19 per 100 000 for pulmonary embolism. The left leg was the most affected limb, and the femoropopliteal location was the most frequent site involved.
DVT can range from mild to severe pain, depending on the individual and the extent of the clot. Others may experience severe pain and swelling, while others may only feel a dull ache. It is important to seek medical attention if you suspect DVT to prevent potential complications.
Deep vein thrombosis is a blood clot or thrombus in a deep vein. They are most common in the leg. But they may develop in the arm or other part of the body. Part of the clot, called an embolus, can break off and travel to the lungs.