Redness, swelling and pain at the corners of the mouth may be related to infectious xerostomia, traumatic xerostomia, contact xerostomia and other causes.
1. Infectious xerostomia: inflammatory reaction in the corners of the mouth caused by bacteria and other pathogens, which can lead to localized redness, swelling and pain.
2. Traumatic keratitis: the corners of the mouth are broken by medical trauma and severe physical irritation, resulting in redness, swelling, and pain at the corners of the mouth.
3. Contact keratitis: patients often have allergies, once in contact with lipstick and other allergenic substances, can cause the body to undergo an abnormal immune response, redness, swelling and pain.
It is recommended that people with redness, swelling and pain at the corners of the mouth go to the hospital in time to clarify the cause of the disease and standardize the treatment under the guidance of the doctor.