T-cell lymphoma, also known as T-cell lymphoma, is one of the malignant tumors of the lymphatic system. i. Viral infections, especially human T-cell lymphoma virus infections and EBV infections, may induce T-cell lymphoma. ii. Second, physical factors, commonly the effect of various radioactive substances, such as various radionuclides, X-rays, etc., may cause T-cell lymphoma. Third, chemical factors, such as various toxic gases, such as formaldehyde, paints, benzene, etc., which may cause the breakage of normal DNA in the human body after receiving these toxic substances for a long time and thus induce T-cell lymphoma. Fourth, immune factors cannot be ruled out either, as the decline of autoimmune function, such as patients who apply chemotherapy drugs for a long time, may also cause the occurrence of T-cell lymphoma.