There is a link between acne & HPV. Ask anyone who has been diagnosed with HPV. Its just not common knowledge due to the LACK of people caring about this disease. The CDC knew in the 70's that HPV causes cancer yet developed NO tests for doctors to give during checkups. Theres a test for HIV, tahts a virus too. Just as easily detectable! But aids was more of a concern at the time, so all the $ and public awareness campaigns went to HIV detection and prevention. True story.
Multiple skin conditions suggest you are under a lot of stress and in particular may be doing things that overburden your liver such as eating too much junk food (high fat, high sugar), drinking a lot of alcohol, etc.. Get some good sleep, avoid processed foods (including "white" breads and pastas), eliminate chemical exposures (both internal and external), drink lots of water, eat plenty of fresh, GREEN vegetables, exercise daily, and find someone to talk to about your troubles. Do all of that, and I can almost guarantee each of these symptoms will gradually begin to improve. :) Consuming healthy fats such as those found in avocados, olive oil, and salmon may also help to mitigate the scalp condition.
Acne and dry scalp are not associated with any std, including HIV.
If you are concerned about HIV, get a test, but nothing you have suggests HIV.
Aj