During the acute phase of the disease, which is about 2-4 weeks after the initial HIV infection, some infected patients will develop hypothermia due to HIV viremia, which is not only in the afternoon but may occur at any time throughout the day. When the patient enters the AIDS stage, the patient’s immune deficiency will cause secondary infection, and the patient’s body temperature will continue to rise after the secondary infection, which can reach 39-40℃. If the patient is infected with tuberculosis, the patient can also show a low fever, with a body temperature of about 38°C. The fever caused by tuberculosis is usually predominant in the afternoon.