Lower extremity venous disease is a disease that is dangerous to human health, so we must pay attention to it. Here we will learn more about this disease: lower limb venous disease can be seen as superficial venous tortuous expansion, or with pigmentation on the upper and lower inner and outer ankles, or the formation of chronic ulcers. Patients with deep vein thrombosis of the lower extremities have an acute onset, mostly with unilateral limb swelling (more common on the left side), redness and heat in the affected limb, pressure pain in the calf or groin area, and persistent limb swelling. Patients with deep venous valve insufficiency mostly present with single or double lower extremity swelling, which is light in the morning and heavy in the evening, aggravated by prolonged walking and standing, and the swelling decreases or disappears after resting in bed or elevating the lower extremity. Venous ultrasound can be a good identification.