Bad breath, dry mouth and yellow urine may be caused by liver fire, stomach fire and other causes. 1. Most of the liver fire is caused by depression and anger, which results in liver depression and fire (liver qi is not working, leading to fire and heat). Patients not only have dry mouth, bad breath and yellow urine, but also have red face, red eyes, constipation, irritability, and in severe cases, deafness, tinnitus, epistaxis, and red tongue with yellow fur. Under the guidance of a doctor, the treatment method is to clear liver fire, and gentian and liver diarrhea soup can be chosen. 2. Most of the stomach fire symptoms are caused by a fondness for spicy food, or stomach fire that is usually very strong, or evil heat that offends the stomach, or depression and liver fire that offends the stomach (the fire produced by the liver invades the stomach). When stomach heat steams up through the meridians, there will be bad breath and dry mouth, blazing stomach fire, loss of fluid, so short and red urine (small amount of urine, dark yellow color), constipation, can be treated under the guidance of the doctor to clear the stomach and diarrhea fire, you can choose to clear the stomach powder and so on. Symptoms should be timely medical treatment, under the guidance of the doctor’s diagnosis and treatment with medication, do not self-medication, so as not to delay the condition.