The bad smell of urine in men is mainly caused by bad dietary habits, such as eating too much meat, resulting in a large amount of animal protein after digestion and absorption in the body, many substances containing ammonia will be formed in the urine, so that the urine odor will be greater. In this case, it is recommended to change the diet, eat more fresh vegetables and fruits, eat less meat and drink more water, the urine bad smell phenomenon will be improved. In addition, male urine malodor may also be due to pathological factors, common causes include urinary tract infections, prepuce, glansitis, kidney stones, etc.: a. Urinary tract infections: the different parts of the urinary tract infections can be divided into upper urinary tract infections and lower urinary tract infections. 1. Upper urinary tract infections: including acute pyelonephritis, chronic bacterial cystitis, acute urethritis, which is caused by a variety of bacterial infections. The most common are infections induced by Escherichia coli and Staphylococcus aureus. The infections cause congestion, edema, and swelling of the urinary tract epithelium. The highly swollen epithelium is easily shed and, together with the bacteria in the urine and the waste products of the body’s metabolism, the urine can easily become cloudy and foul-smelling. In this case, male patients are advised to improve routine urine examination, clarify the type of infection and treat it symptomatically; 2. Lower urinary tract infection: including acute and chronic bacterial cystitis, acute urethritis, commonly caused by gonorrhea and common bacterial infections. For example, gonorrhea, male patients may flow yellowish-white pus from the outer urethra, and there is itching at the urethra, which can also lead to foul-smelling urine, and can be treated with cephalosporin or penicillin antibiotics as prescribed by the doctor. In addition, non-gonococcal urethritis caused by mycoplasma and chlamydia can also result in foul-smelling urine, and this type of infection can be treated with macrolide antibiotics as prescribed by the doctor after diagnosis. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things. In addition, the foreskin is too long and the glans area is not clean, which may also lead to the occurrence of circumcision and glansitis. Patients may show symptoms such as foreskin edema, erosion, exudation, local itching, glans edema, erosion, bleeding, etc. In severe cases, blisters may also appear, and there may be a pus odor during urination. Treatment requires culture examination of local secretions and, if necessary, symptomatic treatment with drugs or cleansing treatment. Kidney stones: Due to the accumulation of calcium oxalate and other crystalline substances in the kidney, patients may show dull pain or severe pain in the lower back. Some patients may have hematuria, and fishy odor can appear during urination. Treatment should be symptomatic antispasmodic pain relief and anti-inflammatory treatment according to the patient’s symptoms, and surgical stone extraction or lithotripsy treatment can be taken if necessary. Fourth, other: for example, severe diabetes, liver disease, etc. When acidosis occurs in diabetic patients, a large amount of ketone bodies will appear in the urine, which in turn may result in foul-smelling urine. When men suffer from severe liver disease, liver cells are damaged, affecting liver metabolism, which in turn leads to the inability to properly filter toxins from the body, which can also lead to a more foul odor in the urine. In addition, necrotizing cystitis may also lead to foul-smelling urine. Patients are advised to seek medical attention in a timely manner, and after completing relevant tests, a clear diagnosis is made and targeted measures are taken for treatment.