Detailed answer

Excessive sweating can worsen hyperpigmentation as it can increase melanin production and activate the pigment cells in the skin. Sweat can also contain various toxins and impurities that may irritate the skin and trigger inflammation, leading to further darkening of the hyperpigmented areas. Additionally, the constant moisture and friction from sweat can also contribute to the breakdown of the skin's natural protective barrier, making it more susceptible to damage and discoloration. Therefore, it is important to manage sweat and keep the skin clean and dry to minimize the exacerbation of hyperpigmentation.