The incidence of skin cancer in Asia is not high, but it is a very malignant tumor disease, which is more harmful to patients and difficult to detect in early stage, which brings great trouble to patients’ treatment, so what are the symptoms of early stage skin cancer? The symptoms of early skin cancer are not characteristic. Generally, patients can show erythematous or papular lesions slightly above the skin surface, often accompanied by scaly flaking or scab formation on the surface, and the symptoms are similar to benign skin diseases such as psoriasis, eczema and inflammation. Further development of the lesion will show certain characteristic signs, such as a shiny, translucent papule-like nodule with oozing blood and dilated capillaries on the surface. The symptoms of early skin cancer are very similar to those of some precancerous lesions such as solar keratosis and keratoacanthoma, which are very difficult to distinguish. Sun keratosis has rough erythematous spots above the skin surface covered with scales, and after removing the scales, the erythematous spots often have no obvious elevation. The early symptoms of this kind of skin cancer are very similar to those of in situ squamous cell carcinoma, which is a well-defined erythematous papule slightly above the skin surface, except that the scales and scabs of the latter are more obvious and the lesion is more essential. How to prevent skin cancer The secret of skin cancer prevention is very simple, which is to eat alkaline food frequently to prevent the accumulation of acidic waste, because the acidified body fluid environment is the fertile soil for normal cells to become cancerous.