Detailed answer

Hyperpigmentation refers to the darkening of patches of skin due to an increase in melanin production. While oral bacterial infections and gum diseases can cause inflammation in the gums, they do not directly cause hyperpigmentation. Hyperpigmentation is more commonly associated with factors such as sun exposure, hormonal changes, certain medications, and skin injuries. It is important to consult with a dermatologist or healthcare professional to accurately diagnose the cause of hyperpigmentation and develop an appropriate treatment plan.