Skin tumors mainly occur between 30 and 70 years old, and the older the age, the higher the incidence. The etiology of skin tumors is very complex, involving external factors such as ultraviolet radiation, chemical carcinogens, ionizing radiation, viruses and other environmental factors, and also closely related to DNA changes, genetic characteristics, immune function and hormone level changes of body cells. The former includes seborrheic keratosis, pigmented nevus, hemangioma, etc. The latter includes basal cell carcinoma, squamous cell carcinoma, malignant melanoma and Paget’s disease, etc. Benign skin tumors can stop growing after enlarging to a certain extent and are generally not life-threatening, but some benign skin tumors may become malignant and thus threaten patients’ lives. In addition, the intermediate stage between normal tissues and cancer is called pre-cancerous lesions, and the lesions at this time also need to be especially alert. Treatment of skin tumor There are many treatments for skin tumor, including surgical excision, drug therapy and photodynamic therapy, which should be individualized according to the patient and rash condition. Early manifestations of skin tumor In daily life, besides avoiding the above mentioned external factors that may trigger skin tumor, how to detect skin tumor at an early stage, make timely diagnosis and become a “scout for early detection of skin tumor” is crucial to the treatment and prognosis of each skin tumor patient. So what are the early manifestations of skin tumor? 1.The appearance of lumps or ulcers on the skin surface that do not disappear or gradually increase in size may be the most direct manifestation of malignant tumor, and ulcers usually occur on the basis of lumps; 2.Skin scabs for no reason, especially those that do not disappear for a long time after scabs, should be highly noticed; 3.Proliferations on the skin surface that deepen or lighten in color within a short period of time, rapidly increase in size, hair loss, itching, oozing and ulceration, especially on the soles of the feet and toes. (4) The following manifestations of nevus on the skin surface should be consulted as soon as possible: (1) asymmetric changes in appearance, such as as asymmetry between the left and right parts of the nevus; (2) unevenness of the edge of the nevus; (3) gradual enlargement and protrusion of the lesion; (4) uneven color, even blue, gray, white, red, etc.; (5) tendency to bleed; (6) appearance of long-standing vesicles and ulcerated wounds. erosion, ulcerated wounds. (5) The presence of protruding growths or sores that do not disappear for a long time in exposed areas, such as the head, neck, back of the hands, chest, and back, should be alerted; (6) Persistent itching of the skin without any obvious cause, and the presence of tumors should be alerted when other factors are excluded. Sometimes limited itching suggests tumor in the neighboring area; 7. If middle-aged or elderly people find “age spots” which occur suddenly and grow rapidly, they should also pay attention to the possible existence of malignant tumor. Once the above-mentioned symptoms are found, it is necessary to go to the regular hospital for further examination and diagnosis in order to provide timely and accurate treatment.