The smell of urine in urine generally refers to the smell of ammonia volatilized in normal urine. The heavy smell of urine may be caused by poor diet or holding urine, and can generally be relieved by avoiding the causative factors. At the same time, urinary tract infections, diabetes and other factors often cause the smell of urine to increase, so the causative factors can be divided into two categories of general factors and disease factors: I. General factors: 1. Dietary factors: When the protein in the urine increases, it can cause an increase in the acidity of the urine, and the protein decomposition produces a stronger ammonia smell, that is, what patients call the smell of urine. Long-term high-protein diet, such as the intake of a large amount of meat, soy products, eggs, etc., as well as garlic, raw onions, durian and other foods with a strong smell, may cause an increase in ammonia in the urine leading to urinary taint; 2, life factors: some patients have the habit of holding urine, there is no timely urination, will cause the accumulation of urine, ammonia concentration increases, producing a stronger smell when urinating. At the same time, due to strenuous exercise, high-intensity labor, drinking too little water and other factors often cause the concentration of urine, resulting in an increase in the concentration of urea, the decomposition of ammonia, resulting in a strong smell of urine. Second, disease factors: 1, urinary system diseases: urinary tract infections are the most common, mostly by Gram-negative bacilli, such as Escherichia coli, Klebsiella and other infections stimulate the decomposition of urea to produce ammonia, appearing heavy urine smell, painful urination, frequent urination and other performance; 2, gynecological diseases: due to the special anatomical location of the female vaginal opening and urethral opening, bacterial vaginitis, pelvic inflammatory disease and other gynecological diseases of pathogenic bacteria may also cause Urinary tract infection, and its own inflammation can lead to the patient’s lower body secretions odor, therefore causing urine odor heavy; 3, other diseases: diabetic patients due to high blood sugar produced urinary ketones, if accompanied by ketoacidosis, there are a large number of ketone bodies in the urine, which in turn causes urine is rotten apple smell, so that patients feel urine testy.