Someone may be mistakenly diagnosed with strep throat and treated with an antibiotic, which may result in a drug rash. The rash is usually temporary, and it will likely be itchy, raised, and splotchy.

PANDAS syndrome is the result of an autoimmune response to a strep infection. Learn about causes, symptoms, treatment, and more at WebMD.

Contact dermatitis is an itchy, red rash that’s caused by direct contact with a substance or an allergic reaction to it. You may also develop bumps or blisters that ooze or crust over.