November 1st is World Scalp Health Day. The scalp belongs to the surface skin of the human body, which normally updates and falls off every day. A small amount of debris belongs to normal skin metabolism. Wang Dan, the attending physician of the dermatology department at Xiangya Third Hospital of Central South University, said in an interview with People's Daily that if the head moves and "snowflakes float", one should be vigilant that there may be health issues with the scalp. Design and production: intern Yuan Xiaoqian (from Xinshe)