Common diseases of arteries include: atherosclerosis-occlusive disease, diabetic foot, vasculitis, arterial embolism and thrombosis, etc. ①Blackness, necrosis, pain in the foot, or rupture that does not heal for a long time. ② numbness, coldness, pain, abnormal sensation in the lower leg or foot, and weakness of the foot when walking ③ walking distance is shortened, and foot pain or soreness and pain in the lower leg is felt after walking for a certain distance, and rest is needed for 3~5 minutes before walking again (intermittent claudication) ④ pale color of the foot, loss of sweat hair, thickened nails and slow growth. Common diseases of veins: varicose veins, deep vein thrombosis, superficial phlebitis, old rotten legs, dermatitis ① sudden swelling, pain, red or pale color of lower limbs or calves ② long-term swelling of calves, aggravated after activity or in the afternoon, reduced after rest or early in the morning ③ superficial veins of calves are tortuous and dilated, or accompanied by patchy deepening of skin color, accompanied by itching, or local pain ④ mid and lower calf rupture does not heal for a long time