2. Body Ringworm
Tinea corporis of the body is a slow inflammatory condition that causes red patches of pustular nature. These patches can increase or decrease depending on the seriousness of your condition. It may occur on the arms, trunks or legs.
The risk of developing Kerion is realistic as well; Kerion is a pus-filled lump of a few centimeters. You might confuse it with dandruff, but the rapid hair loss associated with it resembles the effects of chemotherapy treatment.
Furthermore, the black dots at the center of the circular red rash may become permanent without medical attention. So, you should get it checked as soon as possible.