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

Psoriatic arthritis a form of inflammatory arthritis that occurs with psoriasis, a skin condition that shows up as a red scaly, sometime itchy rash that typically occurs over the knees, elbows and ...

While red and itchy like other rashes, the shingles rash is otherwise ... which are often seen on the knees, elbows, or scalp ...