Most of the time when you have a fire, it will cause tooth pain. There are two kinds of toothache caused by fire, one is that the tooth itself is decayed, it may be deep caries or pulpitis, usually the body resistance is strong, the invasion ability of bacteria is weak, the tooth does not feel pain. When the immunity of the body is low in case of fire, the invasion ability of bacteria will be enhanced and the tooth will be painful. If the tooth nerve is inflamed, the pain will be more intense and sometimes it is difficult to sleep or wake up from sleep with pain. Toothache during fire can also be caused by gingivitis or periodontitis. Poor oral hygiene, failure to effectively remove plaque in a timely manner after eating, when eating spicy and stimulating foods, or when there is more heat in the body and symptoms of fire, may lead to localized edema of the gum tissue or congestion of the gums around the teeth, triggering gingivitis or pericoronitis. This condition requires timely pericoronal rinsing and medication to reduce bleeding or edema of the gums. Sometimes gingivitis can also lead to significant pain. So fire can cause a decrease in the body’s immune system or pericoronitis, leading to pain in the teeth.