1, internal hemorrhoids occur in the anal canal above the dentate line, internal hemorrhoids are generally painless, in order to blood, hemorrhoid nucleus prolapse as the main symptom, serious will spurt blood, hemorrhoid nucleus prolapse can not be returned after the self, as well as the difficulty of stool, can not wipe clean after the stool, a feeling of swelling. There is generally no pain, but there is severe pain when there is a thrombosis that becomes embedded. 2.External hemorrhoids are located below the dentate line, with pain and lumps as the main symptoms, and there are skin flaps of different sizes and shapes around the anus. According to its different pathological characteristics, it can be divided into four types: varicose veins, connective tissue, thrombosis and inflammation. The first two are generally uncomfortable, while the last two are painful. The inflammatory external hemorrhoids are the most common, mainly manifesting as raised skin folds at the anal verge, redness, edema, congestion, pressure pain, increased pain during defecation, and a small amount of discharge, some of which can be accompanied by general discomfort and fever. 3.Mixed hemorrhoids have both internal and external hemorrhoids, and the main clinical symptoms are prolapse of rectal mucosa and skin, swelling, pain, and repeated infection.