If you have toothache, don’t eat anything cold, too cold or too hot stimulation may lead to further aggravation of tooth nerve congestion and cause severe pain. If the toothache is already deep, the upper part of the filling treatment can be carried out after the pulp cushion, which can relieve the pain of cold and hot stimulation. If the toothache is already spontaneous, it is recommended to carry out pulpotomy, nerve killing and perfect root canal treatment in time. If the toothache also eats something too cold or too hot, it is likely that the inflammation will spread further to the periapical area, causing inflammation of the periapical area and resorption of the alveolar bone. Do not delay treatment after a toothache, as it may cause loosening of the tooth and may even affect the normal use of the tooth.