AIDS has different clinical manifestations at different stages. If the AIDS patient is in the asymptomatic stage, there are no uncomfortable symptoms or special signs at this time, just like normal people. If AIDS is in the onset stage, it is more different from normal people, and there will be related clinical symptoms, such as prolonged low-grade fever, chronic diarrhea, weight loss, leukoplakia of the oral cavity, accompanied by nausea, fatigue, and even psycho-neurological symptoms, and so on. Some AIDS patients may have opportunistic infections, such as lung infections, central nervous system infections, intestinal infections, etc., and the clinical manifestations are different depending on the site of infection.