The bruises in the legs can be divided into pathological and physiological cases: 1, physiological factors: when standing or sitting for a long time, the blood is stagnant in the veins of the lower extremities and the veins are filled with blood, showing bruise-like changes. 2, pathological factors: when the venous valves are not fully closed, the blood flows backwards and hits the walls of the veins or the veins do not flow well, the blood is stagnant and the veins form on the surface of the skin. Earthworm-like tortuous vein group, that is, varicose veins of lower limbs. If the degree of varicose veins in lower limbs is not serious and the symptoms are mild, medical elastic stockings with pressure gradient can be worn to promote blood return by compressing the tortuous blood vessels and improve the stagnation of blood in lower limbs by elevating the affected limbs moderately. If the disease progresses further and ulcers or skin pigmentation appear in the lower limbs, it indicates that the disease is more serious and should be treated by surgery in regular hospital vascular surgery in time.