Erythromycin ointment is mainly used for its antibacterial effect and anti-inflammatory effect, and can be used when there is a skin rupture in the anus that leads to inflammation and infection, and has a good effect. If there are other diseases may be less applicable, mainly the following cases: 1, if bleeding hemorrhoids, internal hemorrhoids prolapse or external hemorrhoids foreign body sensation, it is recommended that the use of proprietary Chinese medicines, such as Ma Yinglong hemorrhoids suppository or hemorrhoid cream, etc., the main role is to clear the heat and detoxification, activate blood circulation and remove blood stasis, erythromycin ointment is ineffective; 2, if there is proctitis caused by a feeling of falling, it is not recommended to use the ointment, consider antibiotics to observe or boiled in traditional Chinese medicine broths Enema, retained enema will have better results; 3, if ulcerative colitis consider using mesalazine; 4, if there is anal fissure caused by pain, erythromycin ointment can be, Vaseline can also be, mainly play a lubricating effect can be.