A skin rash on a baby looks differently depending on the type of skin rash, such as pink pimples for baby acne due to maternal hormones in the womb, notes WebMD. Rashes range in color from red to pink with white or yellow accents.
Another rash might be erythema toxicum, which looks like red blotches that are raised off the skin with white or sometimes yellow small spots in the middle. The cause of this is unknown, and treatment is not necessary. A more concerning rash that can appear on babies is an allergic rash known as hives, which looks like welts on the body and is red, reports Parents magazine.