Detailed answer

Yes, hyperpigmentation is a possible symptom of oral lichen planus. Oral lichen planus is a chronic inflammatory condition that affects the mucous membranes in the mouth, and it can cause various symptoms including white or red patches, ulcers, and in some cases, hyperpigmentation. The exact cause of hyperpigmentation in oral lichen planus is not fully understood, but it is believed to be related to the chronic inflammation and immune response associated with the condition. If you suspect you have oral lichen planus or are experiencing hyperpigmentation in the mouth, it is important to consult a healthcare professional or dermatologist for diagnosis and appropriate treatment options.