Does sun exposure cause hair loss?

Jun 20, 2024 Source: Cainiu Health
Disease description:

I enjoy sunbathing regularly, but I've noticed that after some time in the sun, my hair quality deteriorates and I tend to experience more hair loss. Could sun exposure cause hair loss?

Doctor's answer (1)
Dr. Wang Xiaoyan
Moderate sun exposure is beneficial for hair health, as the ultraviolet (UV) rays in sunlight can promote blood circulation in the scalp and support hair growth. However, excessive sun exposure may damage the hair. Prolonged exposure to intense sunlight can break down the protein structure of hair due to UV radiation, causing it to become dry, brittle, and potentially leading to hair loss. Therefore, it's advisable to avoid spending extended periods outdoors during midday when the sun is strongest, especially without sun protection. If prolonged outdoor activity is necessary, wearing a wide-brimmed hat or using an umbrella is recommended to minimize direct sun exposure to the hair. Additionally, maintaining a clean and well-moisturized scalp and regularly trimming split ends can help protect hair health and reduce the risk of hair loss.