It is not necessary to have a fever followed by a rash after HIV infection. The 2-4 weeks after HIV infection is called the acute infection period, during which patients may have some symptoms, including fever, rash, swollen lymph nodes, etc., which usually last for about 1 to 3 weeks and disappear on their own. There is no certain pattern in the appearance of fever, rash and other symptoms in patients. The symptoms mentioned above are not specific and cannot be used to determine whether or not a person is infected with HIV. Some patients enter the asymptomatic stage directly after infection, that is, they do not have any symptoms. For those who have had high-risk contacts with HIV, it is not possible to determine whether or not they are infected with the virus by the symptoms that appear on their bodies, and they must go to a regular hospital to undergo the relevant examinations. It is recommended to go to the hospital for timely examination and treatment to avoid delaying the treatment.