There are several reasons for the itching sensation in the anal area, which are actually related to the abnormal secretion of anal glands: first, it may be caused by hemorrhoids, especially internal hemorrhoids, which when more serious will stimulate the rectal mucosa and glandular abnormal secretion, and the secretion will cause itching of the skin around the anal opening due to gravity. Second, it may be a lesion of the rectal mucosa, including inflammation and serious prolapse of the rectal mucosa, and the glands secrete in a hyperactive state, which naturally flows around the anal opening. Thirdly, skin diseases around the anus, certain eczema, ringworm is also prone to occur in this area. Fourth, in a more special case, certain parasites can be parasitic within the skin folds around the anus, and there will really be live worms found locally, which will also produce itching and really crawling worms.