Low immunity in men is commonly manifested by the occurrence of various infectious diseases. Immunity is the body’s ability to resist various diseases, so the most common manifestation of low immunity for a variety of diseases, especially the number of infectious diseases become more frequent to respiratory infections, urinary tract infections, such as patients with respiratory tract infections, will lead to coughing, runny nose, sore throat and other symptoms. If the patient has urinary tract infection, it will lead to urinary pain, frequent urination and other symptoms. Physiological or pathological factors can lead to immunocompromise, physiological immunocompromise is mainly seen in children and the elderly, and pathological immunocompromise is mainly seen in patients who have been applying immunosuppressants for a long time or patients with AIDS. Immunocompromised patients can improve their immunity by adjusting their work routine, enhancing physical exercise and adjusting their diet. It is recommended that immunocompromised male patients go to the relevant departments of regular hospitals for detailed consultation.