The main factors that cause bitter mouth and yellow urine are as follows: 1. emotional discomfort, depression and fire, bile drainage then bitter mouth, fire evil burns fluid, thus appearing bitter mouth and yellow urine. 2. long-term heavy drinking or consumption of spicy, stimulating food, such as chili, garlic, onions and other foods, causing excessive damp heat in the body, damp heat down the bladder. 3. low immunity of the patient leads to urinary tract infection with Staphylococcus aureus, Escherichia coli. 4. 4. When the human body has unprotected sex or high-risk sex, it can be infected with syphilis spirochetes or Chlamydia trachomatis, which can lead to the symptoms of bitter mouth and yellow urine. When the human body mouth bitter urine yellow can go to the Chinese medicine department or urology department to improve the relevant examination, clear cause after active treatment. It is important to drink more water, urinate more often and do not eat spicy and irritating food during the illness.