When eating cold and hot teeth stinging pain, most of them are due to the following two reasons: First, caused by dental caries and pulpitis, if dental caries is not treated in time, the development is more serious, and even developed into pulpitis, the nerve of pulp is exposed, often stimulated and infected, like cold and hot is a kind of stimulation to the pulp, the pulp will be stimulated when encountering cold and hot stimulation When the pulp encounters hot and cold stimuli, it will appear soreness, stinging pain and other symptoms. Second, due to the teeth are too sensitive, teeth in the process of use will occur wear, wear after the tooth surface enamel gradually loss, dentin will have a certain degree of exposure, dentin in the encounter of cold and hot stimulation, will also have a tingling or sore feeling.