The formula of Lost Smile San proprietary Chinese medicine is: 250g of Pu Huang (fried), 250g of Pu Huang, 500g of Wu Ling Lipid (fried in vinegar). Lost Smile San is from “Taiping Huimin Hejiaobu Fang”. This formula has the effect of activating blood circulation, dispersing blood stasis, dispersing knots and relieving pain. It is used in treating pain syndrome of blood stasis, which is characterized by stabbing pain in the heart and chest, pain in the epigastrium (abdomen), or post-partum dysuria, or irregular menstruation, and acute pain in the lesser abdomen (lesser belly). In this formula, Wuling Lipid has the efficacy of promoting blood circulation, dispersing blood stasis and relieving pain; Pu Huang has the efficacy of promoting blood circulation and eliminating blood stasis. The two are used together to activate blood circulation, dispel blood stasis and relieve pain. The adverse effects of Lost Smile San are not clear. It is contraindicated in pregnant women, and should be used with caution in patients with weak spleen and stomach, and women during menstruation. Before taking this formula, it is necessary to consult a traditional Chinese medicine practitioner for diagnosis, do not blindly self-medicate.