The oral membrane of Zizhu propolis can give full play to the characteristics of propolis, such as rapid analgesia, anti-inflammation, granulation and promoting the shedding of necrotic tissue. Applying the medicine to the affected area can quickly relieve the pain, promote the healing of ulcer surface, and is beneficial to the treatment of oral ulcer. However, it is best not to drink water when sticking propolis oral membrane. When drinking water, the propolis oral ulcer film will melt, which is easy to fail. It is recommended to drink water after sticking propolis oral membrane for half an hour.