My friend has cancer and feels very uncomfortable. Tell me about it.

Hello, cancer is the root of all evil that kills human life. There are some tumor cells in the human body, which are divided into benign and malignant. The occurrence of tumor refers to the abnormal proliferation of cells in local tissues and the formation of local masses under the action of various tumorigenic factors. Benign tumors can be cleared by surgery, and generally do not recur or metastasize, but only squeeze and block organs and tissues, resulting in dysfunction. Malignant tumor can destroy the structure and function of tissues and organs, cause necrosis, bleeding and infection, and patients may eventually die of organ failure. When the immune function of human body declines due to various reasons, tumor cells may take advantage of it and make people suffer from malignant tumors. The pathogenic factors leading to cell canceration are 1 and physical pathogenic factors such as X-rays and ionizing radiation. 2, chemical carcinogens: such as nitrite, such as pickled vegetables, overnight vegetables contain carcinogen nitrite, moldy grains contain a lot of carcinogen aflatoxin; 3. Viral carcinogens, such as hepatitis B virus and herpes virus. At present, there are no effective drugs and special effects to kill cancer cells in the world, so many cancer patients have lost their precious lives. Therefore, people often talk about cancer discoloration. It's sad to get cancer, but there are many examples of overcoming cancer with strong will and optimistic attitude towards life in real life. Many anticancer drugs and treatments have been invented, which can effectively control the spread and inhibition of cancer cells and greatly improve the survival rate after radiotherapy and chemotherapy. Some patients actively exercise to improve their immune function, and finally they found that the cancer cells were gone. So I suggest you don't give up pessimistically, you should actively treat, exercise, improve your autoimmune function and prolong your life.