Symptoms of skin cancer: increased facial skin wrinkles, scarring of wounds, erythema-like rash, erythema nodosum, skin pain, increased skin fragility, mild skin erosion, red skin scars that do not fade for a long time. 1.Skin ulcers that do not heal for a long time or offend from time to time or have a small amount of bleeding. 2.Where solar keratosis appears to have bleeding, ulceration or asymmetric nodular protrusion, etc. 3.When the skin or old sores that have been irradiated in the past or sinus tracts appear to have ulcers or nodular protrusions. 4. When red skin scars that do not fade away for a long time and show mild erosion, it should be alerted to the possibility of in situ cancer. Care of skin cancer: 1. Patients should do well in sun protection in daily life, so as to avoid the harm of direct sunlight on the skin, and apply sunscreen and bring sunshade when going out, which can effectively resist ultraviolet rays and strong sunlight. 2.Some occupations are inevitably exposed to carcinogenic substances, so these people should not engage in such occupations after getting sick, and should also go to hospitals for regular check-ups, and avoid contact with chemical carcinogenic substances such as coke oil and arsenic agents in life. 3. Encourage patients to establish confidence in overcoming the disease, mobilize patients’ subjective enthusiasm, maintain optimism, avoid tension, keep local cleanliness and prevent the occurrence of infection.