If there is a localized dermatome in the anus, it is usually a connective tissue external hemorrhoid or a dermatome external hemorrhoid, or it may be caused by an abnormal growth of localized skin in the anus, which requires an anal visual examination as well as an anal finger examination for differential diagnosis. If it is due to hemorrhoids you can choose to apply hemorrhoid cream. Generally speaking, connective tissue external hemorrhoids or dermal external hemorrhoids do not have much clinical symptoms, so there is no need to interfere excessively with treatment. If there is an acute edema of external hemorrhoids you can choose to take oral diosmin tablets for treatment and further exclude abnormal skin growths, especially infectious warts or condyloma acuminata. If it is caused by a local viral infection of the skin, local abnormal growths need to be removed and interferon gel applied to the local wound for antiviral treatment.