Help please, my doctors can't figure out what kind of rash my son has?

Rashes: Without seeing your son's rash & knowing more history, it's impossible to know what type of rash your son may have. Many times physicians can't specifically diagnose a rash, but rather rule out certain types of rashes that are more serious or harmful. Many rashes resolve without treatment. Rashes are more concerning if associated with swelling, warmth, pain, difficulty breathing or high fever.