Congenital masses are the most common in children, and the majority of them are benign tumors, while malignant ones are rare. The top three most common tumors in children with skin tumors are: pigmented nevus; trichomegaly (calcified epithelioma); and sebaceous nevus. Other common ones are warty epidermal nevi; epidermal cysts; dermatomal cysts; subxiphoid nevi; and vascular malformations. The timing of surgery for skin tumors in children should consider the following factors: 1. the possibility of self-healing; 2. the therapeutic effect of non-surgical treatment; 3. the impact on development; 4. the speed of lesion development; 5. the possibility of malignant transformation; 6. the psychological impact on the sick child; 7. the size of surgical invasion. Pre-operative considerations for children with general anesthesia 1. If the child shows signs of respiratory infection before surgery: such as sore throat, fever, runny nose, or chest X-ray suggesting signs of lung infection, it is recommended that internal medicine consultation be actively controlled and surgery postponed. This is because these conditions increase airway reactivity, greatly increase the risk of anesthesia, and predispose to intraoperative respiratory distress. So please take care of your child before surgery and try to prevent colds; 2. You must abstain from water before general anesthesia, which means that you cannot eat rice and water milk; 3. You can drink a small amount of water or sugar water 2 hours before anesthesia (calculate the amount of water intake according to your weight); 4. For breastfed babies, you can feed breast milk 4 hours before anesthesia, and if it is milk, you need 6 hours of light food, which is easily digestible without fat and meat carbohydrates, such as toast, buns, rice, etc., at least 6 hours fasting; ordinary food for at least 8 hours fasting; 5, if the child is in the period of tooth replacement or loose teeth, please inform the anesthesiologist early, loose too much intraoperative will help the child to remove, so as not to fall into the esophagus or trachea during surgery; 6, the child’s wrist “wristband identification “, do not lose it.