In HIV positive people, sometimes the parasite can cause a small group of red bumps above the cheeks, near the eyes. These bumps usually do not itch. The skin's reaction to demodex may come back after treatment. Usually, demodex does not become serious. Treatments can include using Kwell lotion overnight on the affected area, and washing it off the next morning.
Some serious diseases can cause skin symptoms.
These symptoms usually are a sign that the disease is advanced. Two of these diseases are syphilis and cryptococcosis. When a person is first infected by the syphilis bacteria, they may develop a rash on their body or a painful lesion in the mouth, the anus, the penis or the vagina. This lesion usually heals by itself in 4 to 6 weeks. If syphilis is not treated, secondary syphilis symptoms can develop from a few weeks to a year later.