[…] dryness AC, rhagades, perleche, cheilosis, commissural cheilitis, angular stomatitis, lip pain, inflammation at corners of mouth, lip cracks, aphthous ulcers, mouth ulcers
[mtatva.com]
Often it affects the corner of the mouth and lips causing inflammation. This causes painful irritation on the mouth.
[diseasespictures.com]
Pain as a result of irritation and inflammation at the corners of the mouth Erythema at the corners of the mouth. Swelling at the corners of the mouth.
[epainassist.com]