Squamous cell carcinoma of the skin is clinically characterized by a certain tendency to metastasis and recurrence. The clinical prognosis of squamous cell carcinoma of the skin is better if it is in early stage. Squamous cell carcinoma of the skin is divided into highly differentiated squamous cell carcinoma, moderately differentiated squamous cell carcinoma and poorly differentiated squamous cell carcinoma. In case of highly differentiated squamous cell carcinoma, the degree of malignancy is relatively low, and the scope of excision will be expanded appropriately, and then repaired by implantation or transfer flap, etc., the clinical curative effect is relatively good. However, in the case of low-differentiated squamous cell carcinoma, patients should be allowed to undergo regular review after surgery, usually in three months, half a year or one year, including chest radiographs, ultrasound and other examinations in order to find out whether there is any metastasis in the internal organs. In addition, it is necessary to know whether there is local recurrence.