The causes of male urine odor are generally: urinary system inflammation, urine concentration, organophosphorus poisoning, ketoacidosis, phenylketonuria and so on. 1. Inflammation of the urinary system: If men do not pay attention to hygiene and cleanliness in general, without changing underwear, it is easy for bacteria to attach to the urethra, retrograde infection along the urethra, resulting in the growth of bacteria in the urine, which will lead to men to appear in the urine odor, and sometimes accompanied by frequent urination, painful urination. 2. Concentration of urine: If men drink less water in their daily lives and sweat more, it is easy to cause the urine to be retained in the bladder, which leads to the phenomenon of concentration of urine, resulting in men’s urine odor when urinating. 3. organophosphorus poisoning: organophosphorus pesticides into the body after combining with acetylcholinesterase to produce metabolic substances, through the blood circulation of the kidney filtration from the urinary discharge, the taste similar to garlic. 4. Ketoacidosis: ketoacidosis is a metabolic system of emergency, patients with excessive hunger, diabetes, or alcoholism can cause. The urine will have a rotten apple flavor. 5. Phenylketonuria: is a common amino acid metabolic disease, is due to a defective enzyme in the metabolic pathway of phenylalanine, so that phenylalanine can not be converted to tyrosine, resulting in phenylalanine and its ketoacid accumulation, and a large number of discharged from the urine. Urine moldy odor There may be other reasons for the heavy odor of male urine, the patient needs to go to the regular hospital in time for examination and early treatment.