External hemorrhoids usually have no specific symptoms, but usually become swollen and painful when a blood clot or infection occurs. External hemorrhoids usually appear as one or more raised swellings or skin flaps of varying size and shape at the back of the anus or in the middle of the front of the anus. It is usually related to the difficulty in passing stool due to eating spicy and stimulating foods often, so the varicose veins in the anal canal are overfilled. In most people, an oval-shaped soft swelling can be felt at the anal verge after defecation, but if infection, edema or thrombosis occurs, the swelling may become hard and painful. The swelling is more obvious if the person is sedentary, standing or obese, has a chronic cough, or is under weight for a long time. The main thing is prevention, do not be constipated, eat more fruits and vegetables, keep the bowel movements smooth and soft, do not be obese.