Detailed answer

Air conditioning can have a negative impact on hyperpigmentation due to its dehydrating effects on the skin. The cool air from air conditioning units often lacks humidity, causing the skin to lose moisture and become dry. This dry environment can disrupt the skin's natural barrier function and compromise its ability to regulate melanin production. As a result, the skin may respond by producing more melanin, leading to further darkening of pigmented areas and potentially worsening hyperpigmentation. To counteract the effects of air conditioning, it is important to maintain a well-hydrated skin by using a moisturizer with humectant ingredients and drinking plenty of water. Additionally, incorporating a daily sunscreen with a high SPF will help protect the skin from UV damage, which can also trigger hyperpigmentation. Finally, using a humidifier in the room can help reintroduce moisture into the air and minimize the drying effects of air conditioning on the skin.