A red, crusty rash around the mouth may be caused by irritation, infection, or inflammation. One common cause is Impetigo, which can create red sores and yellow “honey-colored” crusts. Another possibility is Perioral Dermatitis, which causes red bumps, dryness, and peeling skin.
Other causes may include eczema, allergic reactions, razor irritation, cold sores, or reactions to skincare products.
Doctors recommend avoiding harsh creams, scrubbing, or picking at the rash, since this can worsen irritation or spread bacteria. Gentle washing and good hygiene are safer until the skin is checked.
See a doctor if the rash spreads, becomes painful, swollen, warm, produces pus, or develops yellow crusts, as treatment may require antibiotics.