People infected with AIDS during the incubation period (asymptomatic period) will gain weight if they eat more and lack exercise. However, during the AIDS symptomatic stage, particularly in its advanced stages, their body weight generally declines significantly, often by more than 10%, so it is important to consider the specific circumstances. Once AIDS is definitively diagnosed, it is necessary to undergo scientific and rational treatment for HIV/AIDS. By addressing it early, significant damage to immune function can be prevented, allowing the body to gradually return to normal.