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The mouth may act as a reservoir of Candida that reinfects the sores at the corners of the mouth and prevents the sores from healing. [citation needed] A lesion caused by recurrence of a latent herpes simplex infection can occur in the corner of the mouth. This is herpes labialis (a cold sore), and is sometimes termed "angular herpes simplex". [2]
“Visually, angular cheilitis appears in the corner of the mouth as cracked, scaly skin, while cold sores can occur anywhere around the mouth,” she explains. “Usually, it looks like a cluster ...
Herpes labialis (cold sore) is a common cause of infectious cheilitis. [20] A lesion caused by recurrence of a latent herpes simplex infection can occur in the corner of the mouth, and be mistaken for other causes of angular cheilitis. In fact this is herpes labialis, and is sometimes termed "angular herpes simplex".
Rare reinfections occur inside the mouth (intraoral HSV stomatitis) affecting the gums, alveolar ridge, hard palate, and the back of the tongue, possibly accompanied by herpes labialis. [14] A lesion caused by herpes simplex can occur in the corner of the mouth and be mistaken for angular cheilitis of another cause.
Cold sores, on the other hand, are contagious — they’re caused by the herpes simplex virus — and tend to crop up outside the mouth, typically along the border of the lips.
The commissure is the corner of the mouth, where the vermillion border of the superior labium (upper lip) meets that of the inferior labium (lower lip). The commissure is important in facial appearance, particularly during some functions, including smiling. As such it is of interest to dental surgeons.
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