Toothache caused by fire is a common clinical symptom. Fire is a term used in Chinese medicine, which is considered to be caused by an imbalance of yin and yang in the human body and an exuberant internal fire, often accompanied by symptoms such as mouth ulcers and swollen and painful gums. To determine whether a toothache is caused by fire, it can be judged by the onset of triggers and clinical manifestations. 1, with a clear cause: toothache caused by fire often has a clear cause, such as irregular work and rest time before the onset of the disease, more alcohol consumption, high sugar intake, preference for fried food, do not pay attention to oral hygiene, coupled with dry weather, easy to produce the symptoms of toothache. 2, other accompanying symptoms: toothache caused by fire, mainly manifested as red and swollen gums and swollen lymph nodes, accompanied by tooth root pain, mouth ulcers, bitterness, fever and constipation and other systemic symptoms. To prevent toothache caused by fire, you can start with diet and life conditioning. On the one hand, the diet is based on light food, avoid frying, barbecue, etc., and eat a moderate amount of cold vegetables and fruits, which have the effect of moistening dryness, clearing heat and laxative. On the other hand, we need to pay attention to life and living conditioning. In particular, lack of sleep and overexertion are common causes of fire and should be avoided to reduce the chance of toothache caused by fire.