Rectal ulcers can usually be treated with potassium permanganate rinses or sitz baths, but should be performed as prescribed. In addition to the application of potassium permanganate, other treatment modalities should be performed as prescribed. Potassium permanganate has local bactericidal and antipruritic effects, which can control infection, promote local blood circulation and prevent exacerbation of the disease. It can be clinically used in the treatment of rectal ulcers, and it is recommended that potassium permanganate can be used for sitz bath or rinsing. However, the specific method and the concentration required should be consulted with the doctor. The treatment of rectal ulcers, first of all, we should pay attention to bed rest, supplement protein, you can take oral mesalazine and other drugs, in the acute attack period using hormone drugs for treatment, you can use dexamethasone intravenous drip, you can also use hydrocortisone added to saline for retention of enema. For the diagnosis and treatment of rectal ulcers, it is recommended to consult the anorectal department of a regular hospital and consult a specialist for guidance.