Squamous cell carcinoma is a malignant tumor of skin, because the onset is very slow, squamous cell carcinoma doesn’t have very special symptoms, but it should be taken seriously when there are signs appearing in the early stage, and it should be checked in the hospital. After surgery or trauma, the ulcers on top of the continuous scar will not be healed, and it is necessary to worry about whether it is secondary cancer or whether it is cancerous, or whether there is chronic eczema or chronic dermatitis, which is usually treated with medicines, but now it is ineffective after various kinds of medicines are administered, and hard nodules or ulcers appear on top of the original skin and the ulcers are slowly expanding outwardly, so it is necessary to worry about whether it will be cancerous or not. If there are scaly knots on the face that are not easy to peel off due to prolonged exposure to the sun, and if there is slight bleeding after the scales are peeled off, it is necessary to suspect the possibility of squamous cell carcinoma. However, squamous cell carcinoma does not have any subjective symptoms, so if you have any of the above symptoms, you should go to the hospital to check whether it is squamous cell carcinoma.