On the fourth day of HIV infection, there are usually no specific symptoms, so it is recommended to consult a doctor in time and follow the doctor’s instructions to carry out antibody tests for diagnosis. On the fourth day of HIV infection, most people do not have symptoms, but they may have flu-like symptoms such as sore throat, weakness in the limbs, headache, etc. However, the symptoms lack specificity, so HIV cannot be diagnosed through symptoms. Generally, the diagnosis can be made by HIV antibody test 2~6 weeks after infection. In summary, there are no specific symptoms on the fourth day of AIDS. If you suspect HIV infection, you should go to a regular hospital and make a diagnosis through antibody test and relevant medical history.