Patients need to undergo dermatologic surgery due to their medical condition. Due to individual differences in patients, different aesthetic views of patients, as well as the influence of many factors in the perioperative period and the limitations of modern medical technology, there are certain risks associated with dermatologic surgery, and patients and their families need to understand the possible complications (side effects) that may occur during this procedure: Complications:. 1, anesthesia accidents (such as allergic reactions, etc.); 2, intraoperative bleeding, tissue damage; postoperative bleeding, infection, wound dehiscence; 3, some patients relapse, treatment is ineffective; 4, poor wound healing, scar formation; the length of the incision is greater than the diameter of the skin lesion; plastic and cosmetic results are not satisfactory; 5, a small number of patients in treatment due to mental stress and cardiovascular accidents, cardiac arrest, etc.; 6, other: rare and Unpredictable side effects and complications, such as incomplete lacrimal lake resulting in tears, etc. Most of the patients can recover with symptomatic treatment, but very few patients have serious complications, even life-threatening.