Detailed answer

Night creams are primarily designed for facial skincare and may not be formulated to specifically target dark underarms. Dark underarms can be caused by factors such as hormonal changes, friction, and hyperpigmentation. To address this issue, it is recommended to use specialized underarm lightening products that contain ingredients like hydroquinone, kojic acid, or arbutin. Additionally, maintaining proper hygiene, avoiding tight clothing, and exfoliating the area regularly can also help improve the appearance of dark underarms.