Having AIDS at the age of 55 will affect life expectancy. AIDS patients in the later stages of life due to severe immune deficiency, there will be a variety of opportunistic infections, and many patients will also suffer from malignant tumors, which greatly shorten the survival period of patients. The biggest characteristic of AIDS patients is that they are very prone to opportunistic infections, such as sporotrichosis pneumonia, fungal pneumonia, cryptococcal meningitis, toxoplasmosis encephalopathy, etc. These infectious diseases are often difficult to treat, and will seriously damage the function of the patient’s various organs, which will eventually lead to the patient’s death. Many AIDS patients also suffer from rare malignant tumors, such as Kaposi’s sarcoma, lymphoma, brain tumors, etc. These malignant tumors will seriously shorten the life expectancy of patients. According to statistics, the average survival period of AIDS patients is only 12 to 18 months, and patients with sporotrichosis pneumonia and Kaposi’s sarcoma have a higher mortality rate, with almost no patient surviving more than five years. It is recommended to be clean, pay attention to personal protection, quit bad habits to avoid HIV infection. Patients are advised to follow up regularly and take medication on time.