Symptoms of lower extremity venous thrombosis include pain with swelling of the affected limbs, bruising of the skin, chronic ulcers of the lower extremities, etc. It is recommended to consult the doctor in time after the appearance of the corresponding symptoms and take active treatment. 1. Pain with swelling of the affected limbs: due to the blood clots in the veins of lower limbs, it can lead to poor venous return, which causes excessive local venous stasis and pressure on the surrounding tissues, and then it can lead to swelling of the lower limbs, accompanied by pressure and pain, and so on. 2. Skin bruising: due to blood stagnation in the veins of the lower limbs, local venous return obstacles, resulting in superficial veins, capillary dilatation can be blue or purple. 3. Chronic ulcers of the lower limbs: If venous thrombosis of the lower limbs exists for a long time, it can lead to insufficient supply of local blood and oxygen, and at the same time, due to the slowing down of local blood flow, it can affect the local removal of pathogens and the role of dead cells, and then it can lead to the gradual formation of necrosis and ulcers in the affected limbs on the surface of the skin. Suffering from lower extremity venous thrombosis, it is recommended to consult a doctor in a timely manner, under the guidance of a professional doctor to standardize the treatment, so as not to delay the condition.