A malar rash
also called butterfly is a facial rash that is often seen in patients with lupus erythematosus, pellagra, dermatomyositis
and bloom syndrome.
It has the shape of a butterfly and involves the bridge of the nose. Notably, the rash spares the nasolabial folds of the face, which contributes to its characteristic appearance. It is usually macular with sharp edges and not itchy.