Eating hard things tooth soreness may be the emergence of dentin sensitivity, the external mechanical stimulation to produce soreness and discomfort, commonly found in excessive tooth abrasion, hidden cracks. 1. Excessive tooth wear. Excessive tooth wear to the dentin layer, dentin tubules exposed to the outside world of hot, cold, sweet and sour, mechanical stimulation of pain and discomfort, clinical examination using a probe to explore the surface of the tooth symptoms are more pronounced, you need to consider the use of strontium chloride drug desensitization or the production of dental crowns, to protect the teeth from external stimuli. 2. Hidden tooth crack. When chewing too hard food or impacted by external forces, teeth can appear cracks, cracks reach the dentin will be to the outside world of mechanical hot and cold stimuli, discomfort and soreness, oral examination can be found, there are fine cracks on the surface of the teeth, upper and lower biting hard objects symptoms are obvious. Eat hard things toothache is more often the emergence of dental disease, it is recommended to go to the hospital in a timely manner to deal with.