Detailed answer

Hyperpigmentation refers to areas of the skin becoming darker in color. It is commonly caused by factors such as sun exposure, hormonal changes, and skin trauma. Hay fever and allergic rhinitis, on the other hand, are allergic reactions that predominantly affect the nasal passages and respiratory system, leading to symptoms like sneezing, runny nose, and itchy eyes. Although both conditions involve the immune system, there is no direct association between hay fever or allergic rhinitis and hyperpigmentation. It is important to consult with a healthcare professional for proper diagnosis and treatment of any skin concerns, including hyperpigmentation.