External hemorrhoids in hemorrhoids are clusters of veins caused by varicose veins belonging to the veins below the dentate line, and the specific form of external hemorrhoids correlates with the type. There are four common types of external hemorrhoids: varicose external hemorrhoids, inflammatory external hemorrhoids, thrombosed external hemorrhoids, connective tissue external hemorrhoids. 1. varicose external hemorrhoids: manifested as a greenish-purple semicircular bulge, protruding from the anus, smooth edges, soft surface, symptoms are not obvious. 2. Inflammatory external hemorrhoids: protruding from the anus, and accompanied by inflammatory reaction, manifested as redness, swelling, oozing, pain, easy to recur. 3. thrombosed external hemorrhoids: protruding from the anus, and accompanied by obvious hard knots, pain as the main symptom. 4. connective tissue external hemorrhoids: in the anus edge, can be seen and the anal margin of the skin color of the same proliferative tissue, protruding from the anus, touching soft, long-term chronic inflammatory stimulation, friction hyperplasia formation of lumps. External hemorrhoids accompanied by obvious pain and discomfort as well as inflammatory reaction, need to consult a doctor in time to observe, under the guidance of clinicians for standardized treatment.