Detailed answer

Hyperpigmentation refers to the darkening of certain areas of the skin due to the increased production of melanin. It is not commonly associated with oral allergy syndrome, which typically manifests as itching, tingling, or swelling of the mouth, lips, or throat after consuming certain fruits, vegetables, or nuts. Hyperpigmentation can be caused by other factors such as sun exposure, hormonal changes, or skin inflammation. It is important to consult with a healthcare professional or dermatologist to accurately diagnose and treat hyperpigmentation.