A red, flaky, or crusty rash around the mouth may be caused by impetigo, perioral dermatitis, eczema, allergies, or irritation.
Avoid picking the area or using harsh creams, as this can make it worse. Gently wash the skin and avoid sharing towels or lip products.
Seek medical advice if the rash spreads, becomes painful, develops yellow crusts, produces pus, or comes with fever. Proper diagnosis is important because many skin conditions look similar but need different treatments.