The clinical stages of AIDS include the acute phase, asymptomatic phase, and AIDS phase. AIDS patients may show obvious weight loss when they enter the AIDS stage, but they may not show symptoms of weight loss in the acute and asymptomatic periods, so we cannot generalize, but need specific problems and specific analysis: 1. Acute stage: Some patients may show symptoms similar to upper respiratory tract infection, such as fever, headache, loss of appetite, etc. There is usually no obvious weight loss; 2. Asymptomatic stage: AIDS patients In the asymptomatic period usually no physical abnormalities, no specific signs and symptoms. Some patients do not even know they have AIDS until they enter the AIDS stage. The immune function of the patient’s organism at this stage is basically to normal, and infection will not occur easily, so the body will rarely lose weight, and basically the weight can be maintained as normal; 3. AIDS stage: Patients in the AIDS stage, the HIV virus in the body will destroy CD4+ T cells, which are an important part of the body’s immune system, and when the body’s immune system is destroyed, the patient may contract diseases such as Candida albicans esophagitis and Pneumocystis carinii pneumonia, and may suffer from diarrhea, vomiting, loss of appetite, and increasing weight loss. Because AIDS is a chronic infectious disease, and some people infected with AIDS may enter the AIDS stage only after 10-20 years before they have symptoms such as fever, nausea, vomiting, and weight loss, you cannot judge whether you have AIDS by the presence or absence of weight loss.