Pulpitis of milk teeth has its own characteristics, mainly as follows: 1, because the hard tissue of milk teeth is thin, the dentin tubules are coarse and permeable, the bacteria and its toxins in the caries are easy to invade the pulp, and chronic atretic pulpitis is mostly seen clinically; 2, children’s physical and mental development is immature, their perception ability and language expression ability are poor, and the pulp nerve fibers of milk teeth are not well developed, so the early symptoms of pulpitis of milk teeth are not obvious The absence of a clinical history of spontaneous pain does not indicate the absence of inflammation in the dental pulp. The presence of a history of spontaneous pain indicates that there is extensive inflammation of the pulp or even necrosis of the pulp; 3. Pulpitis is mostly a chronic process, and when acute symptoms occur, that is, when nighttime pain occurs, it is usually an acute attack of chronic inflammation; 4. When pulpitis occurs in the milk teeth, there is usually no corresponding lesion manifested on the X-ray.