Cysts of jaw bone are cystic swellings containing fluid in the jaw bone, which gradually increase in size and swell and destroy the jaw bone, and can be classified as odontogenic or non-odontogenic according to their causes. The cyst can also be a hemorrhagic cyst due to injury and an aneurysm-like bone cyst. Shan Xiaofeng, Department of Maxillofacial Surgery, Peking University Stomatological Hospital, Beijing, China Maxillary cysts mostly occur in young adults and can occur in any part of the jaw bone. Apical cysts mostly occur in the upper and lower anterior teeth. Tooth-containing cysts mostly occur in the mandibular third molar, and the maxillary cuspid area is also a good site. Keratocysts or keratocystic tumors occur mostly in the mandibular third molars and the mandibular ascending region. If the cyst grows slowly and there is no conscious symptom at the beginning, if it continues to grow, the bone gradually expands to the surrounding area, then facial deformity is formed. The teeth in the mouth appear loose and shift and tilt. Generally, X-ray or spiral CT can clarify the extent of the lesion and help diagnose and treat it. Treatment of jaw cysts: jaw cysts grow slowly and have good biological behavior, among which keratotic cysts or keratotic cystic tumors are more likely to recur. For small or medium-sized jaw cysts, they are mostly treated by scraping. For large cysts, if it is difficult to scrape cleanly in one operation or if pathological fractures are likely to occur after surgery, a window can be opened and scraping surgery can be performed again.