Cutaneous Post Inflammatory Hyperpigmentation from Morsicatio Buccarum

Post Inflammatory hyperpigmentation (PIH) is a pigmentary phenomenon which commonly follows disease or injury. Examples include thermal or caustic burns, infections, or inflammatory disorders affecting the skin such as acne, atopic dermatitis, or rash. PIH can occur in anyone but is more common in Fitzpatrick types III-VI individuals, where the color tends to be more intense and persist for a longer period than in Fitzpatrick types I and II individuals. We present a unique case of PIH on the skin as a result of frequent biting of the inner buccal mucosa.