AIDS is a chronic infectious disease caused by human immunodeficiency virus infection. After infection, patients can have fever, general malaise, malaise, anorexia, nausea, weight loss, diarrhea, enlargement of the liver, spleen and peripheral lymph nodes, with recurrent swelling and disappearance of the inguinal lymph nodes being the main cause. It is susceptible to various infectious diseases, susceptible to fungi, tuberculosis bacilli and viruses, and the lungs are most commonly affected by Pneumocystis carinii pneumonia and Carpenter’s sarcoma. After infection, patients may have chronic cough, dyspnea and cyanosis. The digestive system is characterized by stomatitis and esophagitis, and patients may have burning pain behind the sternum after swallowing. Neurological manifestations are mainly headache, dizziness, convulsions, dementia, paralysis of limbs, ataxia, bladder dysfunction, and the skin and mucous membranes may show purplish-red infiltration spots or nodules, which may be accompanied by ulcers.