Out of more than 3,000 skin diseases, how do you know what condition you have? These 23 skin rash pictures and expert tips ...

Armpit rashes can be caused by allergic reactions ... It appears in the skin folds of the armpits, groin, and around the neck. It's not common, but an acanthosis nigricans rash can be itchy.

The rashes may be itchy, red and raised ovals ... the AAD explains. The back of the neck is one of the most common spots to have a neurodermatitis patch. Treating neurodermatitis generally ...

The rashes may be itchy, red and raised ovals ... Neurodermatitis is an especially itchy form of eczema that frequently shows up on the back of the neck. Neurodermatitis, also called lichen simplex ...

If your child has or develops symptoms, that is an itchy rash that ... scabies rashes usually spread across the whole body, apart from the head and neck. It often affects skin between the fingers ...