Fire is a folk saying that often manifests itself in symptoms such as mouth ulcers, swollen and painful gums, and short and red urine (small amount of urine, dark yellow in color). Fire is mostly related to exogenous evil, dietary factors, mental factors, etc., and can be divided into two categories: real fire and imaginary fire. Patients with real fire can manifest oral ulcers, swollen and painful gums, dry mouth, short and red urine, nosebleeds, dry stools and so on. Patients with deficiency fire may show hot flashes (a burst of fever), night sweats (abnormal sweating after going to sleep and stop sweating after waking up), heartburn, dry mouth and throat, heat in the hands and feet, and flushing of the cheekbones (reddish color of the cheekbones on the two sides of the face), and so on. If you have any of the above symptoms, it is recommended that you seek medical treatment promptly.