What signals does the body send? Typical symptoms of a leg thrombosis usually appear on one side of the leg and include: sudden swelling (increased leg circumference), pain or tenderness (especially when standing or walking), redness and heat of the skin, and a feeling of heaviness in the limb. If these symptoms occur, especially after surgery or long-distance travel, be highly vigilant.

Who is at higher risk? Any factor that slows blood flow, damages blood vessels, or thickens the blood increases the risk. Common high-risk groups include: those who remain sedentary (such as those who sit for long periods at work, travel long distances by car, or are bedridden after surgery), those who have recently undergone surgery or trauma, pregnant and postpartum women, obese individuals, smokers, and those with a family history of thrombosis or specific medical conditions.

How is it diagnosed and treated? If thrombosis is suspected, doctors usually perform a blood D-dimer test for initial screening. If the result is positive, a Doppler ultrasound examination is used for confirmation, which is the most commonly used and non-invasive gold standard. The core of treatment is anticoagulation (using medication to prevent the thrombus from expanding). In severe cases, thrombolysis or surgery may be necessary. For prevention, the key is to avoid prolonged sitting, drink plenty of water, and high-risk individuals can use compression stockings or medications under the guidance of a doctor.