Dark elbows, what is the cause?

Patient: Hey Doctor! my elbows are really dark and it is very embarrassing for me to wear half sleeves .Can u please help me? Thank you.May GOD bless u all 🙂

Doctor: Dark elbows may be caused by increased levels on melanin, repeated irritation/trauma to the area, hormonal imbalance and genetics. You may try a skin exfoliant and apply a sunscreen with a high SPF when you go outdoors.