Malignant tumors grow faster than benign tumors. 1. Malignant tumors: include cancer, sarcoma and carcinosarcoma. Under the long-term action of carcinogenic factors, the tissue cells of the organism undergo abnormal proliferation, producing a rapid growth that can not be suppressed, and these cells are poorly differentiated, low maturity, and have a clear distinction from normal cells. Malignant tumors not only grow rapidly locally, but also infiltrate surrounding tissues and metastasize to distant places. 2. Benign tumor: it is a tumor with benign biological behavior, which is a new organism formed by proliferation and abnormal differentiation of cells of the organism under the action of certain factors, such as lipoma, misshapen tumor, fibroma and so on. Benign tumor cells are highly differentiated, with swelling growth in the local area, complete envelope, clear demarcation with surrounding tissues, no infiltration of surrounding tissues, and no distant metastasis. When a tumor appears in the body, it is necessary to go to the hospital in time for a clear diagnosis and treatment.