How can a 17 yr old male tell if his chronic swelling lymph modes through out neck is aids or hiv? Sexually inactive.

Check for HIV . He needs to be check for HIV by blood test . More important is to check cause of lymph node enlargement , he needs to be seen by physician, there are several causes of lymph node enlargement in neck area in young individual , don't ignore and see doctor .
Get tested. The best way to be sure you don't have HIV is to get tested. If your test is negative, talk to your dr about the nodes, & see what the cause is. If you're not sexually active and don't shoot up drugs, you probably don't have hiv, but getting tested is still a good idea.