What are the symptoms of skin cancer in a few days?

Skin cancer is more common in the elderly, among which basal cell carcinoma is more common in patients over 40 years old, and squamous cell carcinoma is more common in patients over 50 years old. Generally, the peak age of onset is 51 to 60 years old, it is rare under 40 years old, and even rarer under 20 years old. So what are the symptoms of skin cancer?

The early symptoms of skin cancer are mostly erythematous or papular lesions slightly above the skin surface, often accompanied by scaly desquamation or crust formation on the surface. The symptoms are similar to benign skin diseases such as psoriasis, eczema, and inflammation. If the early symptoms of skin cancer develop further, some characteristic signs will appear, such as a shiny, translucent papular nodule with bleeding on the surface and telangiectasia, or a scar-like fibrous plaque with a smooth surface and no obvious telangiectasia, ulcers, or bulges. Or there are small black spots in the lesion that merge with each other.
The cause of this disease is not yet fully understood. It may be related to long-term stimulation such as sun exposure, radiation, arsenic, tar derivatives, etc. Burn scars, mucosal leukoplakia, chronic ulcers, long-lasting fistulas, discoid lupus erythematosus, radiation dermatitis and other skin damage can also cause this disease. However, many patients have no obvious predisposing factors.