The 5-year-old boy had a bag on the tooth bed considering the emergence of apical cysts, gum polyps and other diseases, need to consult a doctor in time for medication or surgical treatment. 1. apical cysts: if there is an apical cyst, the secretion gathered may lead to such symptoms, apical cysts are relatively small can be used under the guidance of the doctor, metronidazole, ornidazole and other drugs. If the apical cyst is large, it may require incision and drainage or surgical treatment. 2. Gingival polyps: If there is a gingival polyp, timely surgical treatment can be carried out to remove the gingival polyp. Usually need to pay attention to the boy’s oral hygiene, maintain good eating habits, light diet.