Redness and swelling of the anus after hemorrhoid surgery, considering that it may be caused by local wound edema, may also be caused by contact with adhesive tape or other allergens, need to be based on different reasons to choose the relative drug treatment. 1. Postoperative wound edema: after hemorrhoidal surgery, there will be one or more local wounds in the anus, due to the skin tissue by the external stress reaction and local blood circulation and venous return is impeded, so there will be a temporary edema of the local wounds after the operation, accompanied by redness of the skin and mucous membranes, it is considered to belong to the common clinical phenomenon of the postoperative period. In order to eliminate the redness and swelling of the local skin and wound, it is recommended that the patient can take Mai Zhi Ling tablets orally to reduce swelling and pain (eliminate swelling and pain), and at the same time, hemorrhoidal ointment can be applied on the reddened part of the local wound, and it is recommended that the patient can use Bitter Ginseng Wash or 1:5000 potassium permanganate solution to take a sitz bath after defecation. 2. Skin contact dermatitis: some patients belong to the allergic body, contact dermatitis will occur after contact with surgical dressings or medical rubber adhesive tape, which will cause redness and swelling of the skin at the site of contact, contact dermatitis, you need to carry out iodine povidic disinfection, and in the redness and swelling of the part of the appropriate amount of application of dinexed cream antiallergic treatment. Hemorrhoid surgery after the anal redness and swelling, the specific treatment should be carried out under the guidance of the doctor.