I usually just tell them they definitely have what they think they have.
- I have a little red mark on my arm, do I have AIDS?
-You totally have AIDS. Just read this exerpt.
Early symptomatic HIV infection
As the virus continues to multiply and destroy immune cells, you may develop mild infections or chronic symptoms such as:
Swollen lymph nodes
Little red marks
Cough and shortness of breath
source: Mayo Clinic