It most commonly affects young children and develops in the folds behind the knees and elbows, and on the hands, arms ... lower your risk of these skin rashes. The best way to prevent heat rash ...

Swelling and pain then developed in both ankles and shortly afterwards a nonpruritic blotchy erythematous rash developed on lower extremities ... Commonly found on arms, legs, hands, and feet.

and arms. These may have a dusky center. Other people develop a bluish rash without a clear center. According to the AAD, the rash or lump can develop about 30 to 45 days after the bite ...