Fire may lead to toothache, such as stomach fire (the exuberance of fire-heat and evil energy in the stomach). However, toothache is not always caused by fire. The clinical symptoms of the patients with exuberant stomach fire are burning pain in the stomach and epigastric region, aggravated by pressing, acid reflux, heartburn, easy to be hungry, vomiting when eating, dry mouth and bitter mouth, preferring to drink cold water, short and yellowish urine, constipation, and so on. Some patients may also have swollen and painful ulcerated gums, bleeding gums, bad breath and other manifestations. It can be treated with Qinggong San. It has the effect of clearing stomach and cooling blood (eliminating stomach heat, cooling blood heat and preventing bleeding). It can be used to treat stomach fire toothache, which is characterized by toothache and headache, heat in the cheeks, teeth preferring cold to heat, or bleeding from the teeth, or red, swollen and ulcerated gums, or swelling and pain in the lips, tongue, cheeks and cheeks, hot and smelly breath, dryness of the mouth, red tongue with yellow fur, and a slippery pulse. It is not suitable for those whose toothache belongs to wind-cold and kidney deficiency and fire inflammation. If the symptoms of toothache are not relieved for a long time or accompanied by other discomforts, consult a doctor in time to identify the cause and carry out targeted treatment.