Itching without other information is too general a symptom to diagnose the underlying cause.

But since you ask about HIV infection: It sometimes has no early physical symptoms.  When symptoms do occur, they are frequently described as flu-like.  A low-grade to spiking fever sometimes alternating with chills. Mild to severe fatigue.  A generalized ache throughout the body.  Mildly swollen lymph nodes.

Of course, these symptoms could describe the flu. Or a severe cold.  Or hepatitis. Or any number of conditions not even remotely associated with HIV.

Now comes the big question:  What is the basis for connecting HIV with an itch?  Are you at risk for becoming infected with HIV thru unprotected sex, sharing needles, blood transfusions, organ transplantation, or a job-related incident that medical personnel experience?