Since sebaceous nevus is an uncommon birthmark, many mothers tend to be nervous and anxious at the beginning, therefore, it needs to be recognized and handled correctly. The following is a summary of the most common problems encountered by patients: 1. What is a sebaceous nevus? Sebaceous nevus is a congenital abnormality in the development of skin structures, also known as sebaceous malformation tumor. It is usually found at birth or gradually appears as a yellowish or pink hairless area after birth, and is usually found on the head and face. 2.Does sebaceous nevus need to be treated? When should it be treated? Yes. Because tumor-like hyperplasia or carcinoma is likely to occur in adulthood, it is usually treated before puberty. Since the lesion area expands proportionally with age and young children are prone to scratching the lesion area, it is generally recommended to start treatment as early as possible. 3.How to treat sebaceous nevus? There are various treatment methods such as laser, radiofrequency and scraping, but surgical excision is preferred. Smaller sebaceous nevi are directly excised and sutured, while larger ones need to be treated with skin implants or expanders. From the cosmetic point of view, using adjacent tissue repair is the best choice. 4.Does it leave scars after surgery? Will hair grow back? There will be scars after the surgery. Since the hairless lesion area has been removed, hair will grow normally after surgery except for the scar. Exposed areas such as the face often require fine cosmetic surgery design and suture techniques, and fine post-operative scar management to achieve excision of lesions and cosmetic effects, and to minimize scars. 5.How is anesthesia used for sebaceous nevus surgery? How long does the surgery take? Anesthesia mainly includes local anesthesia, sedation anesthesia, general anesthesia and other methods, generally local anesthesia is the main method, and the latter two types of anesthesia are used for younger babies with larger trauma. If the baby does not cooperate, oral sedation with chloral hydrate can be given, or intravenous sedative drugs can be given to assist local anesthesia. The operation time depends on the specific situation, and can be completed in 30-60 minutes for small trauma. 6.How to take care and remove stitches after sebaceous nevus surgery? Generally, the medication change is required every other day after surgery, which can be done nearby or at home, and special hypotonic care is required according to medical advice. The time to remove the stitches depends on the location, about 7 days for the head and face, and about 10 days for the neck. 7.Does sebaceous nevus recur after surgery? Do I need to be seen again? Recurrence is rare after clean excision and can be judged based on visual and pathological sections. Usually, follow-up examinations are required in 1 month, 3 months and 6 months after surgery.