Skin cancer is a malignant tumor originating from the skin or growing in the skin. The sources of tumor cells are different, including epidermis, skin appendages, subcutaneous soft tissue, melanocytes, skin lymphoid reticular tissue, peripheral nerves, hematopoietic tissue, etc.

Skin cancer is a malignant tumor originating from the skin or growing in the skin. The sources of tumor cells are different, including from the epidermis, skin appendages, subcutaneous soft tissue, melanocytes, skinlymphoidreticular tissue, peripheral nerves and Hematopoietic tissue and so on have different names.

That is to say, skin cancer can be named squamous cell carcinoma , dermatofibrosarcoma protuberans , basal cell carcinoma , malignant melanoma, etc. based on the source of the tumor cells. In addition, it is divided into primary cancer and secondary cancer that metastasizes to the skin from other parts of the body.

So, what are the causes of skin cancer?

The induction of skin cancer is often caused by a combination of factors. Its occurrence may be related to the following factors:

① Exposure and ultraviolet rays;

② Chemical carcinogens, such as tar derivatives, asphalt , benzo flowers and other irritations;

③ Chronic irritation and inflammation, such as chronic ulcers, discoid lupus erythematosus , etc.;

④ radiation, ionizing radiation;

⑤ others: such as immunosuppression, stage, viral carcinogens, etc.

How do you know if you have skin cancer?

The first early signs of malignant lesions of skin cancer are signs, such as:

① Symptoms such as repeated bleeding, ulceration or asymmetric nodules in local skin;

② Failure to heal for a long time or Ulcers with a small amount of bleeding;

③ Skin that has been exposed to radiation in the past or old scars, sinus ulcers or protruding masses;

④ Red skin scars that do not fade away for a long time.

Skin can be a mirror that reflects the health of our body, but skin abnormalities are not necessarily caused by cancer . It may also be caused by cancer-like symptoms in the development stage of chronic diseases. Therefore, skin abnormalities can only mean that the body may be affected by a certain disease, but if you want to specifically determine which disease it is, you need to go to the hospital for diagnosis.

If you have the above symptoms, you need to pay attention and go to the hospital in time. The diagnosis will be confirmed based on a detailed physical examination by a doctor and relevant auxiliary examinations.

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The abstract is excerpted from the "Tumor Prevention and Treatment Popular Science Series - Body Surface Tumors" Editor-in-Chief: Wang Shengqiang