Detailed answer

During the menstrual cycle, hormonal fluctuations, specifically the rise and fall of estrogen and progesterone, can influence melanin production and distribution in the skin. This can lead to an increase in hyperpigmentation. Estrogen has a melanocyte-stimulating effect, causing more melanin production, while progesterone stimulates the production of melanin-inducing receptors. The combination of these hormonal changes during the menstrual cycle can exacerbate existing hyperpigmentation or trigger the formation of new dark spots or patches on the skin. It is important to note that individuals may have varying sensitivities to hormonal fluctuations, and not all women will experience a significant impact on hyperpigmentation during their menstrual cycle. However, for those who do, it is recommended to incorporate targeted skincare routines and sun protection measures to help manage and prevent further hyperpigmentation during this time.