A red circle around the mouth may be caused by perioral dermatitis, xerostomia, contact dermatitis and other diseases.
1. Perioral dermatitis: the lesions are scattered papules and papules 1~2mm in diameter, with a red base, mainly in the perioral area, the chin and the side of the nose. The etiology is still unknown, and may be related to fluoride toothpaste, helminth mites, and long-term topical glucocorticoid drugs. Patients have the symptom of a red circle around the mouth.
2. Keratitis: the etiology is more, may be related to infection, trauma and malnutrition and other factors, manifested in the corners of the mouth area of the skin mucous membrane cracking, erosion, oozing and crusting, accompanied by pain. Patients thus have a red circle around the mouth performance.
3. contact dermatitis: due to contact with allergens around the mouth or stimulation, resulting in localized redness, swelling, pimples, itching and other symptoms, which is manifested as a red circle around the mouth.
There are many reasons for the red circle around the mouth, it is recommended that patients go to the hospital in time to clarify the cause of the disease.