When a patient has the clinical symptom of reddish-brown urine, first of all, the influence of dietary factors should be excluded, for example, after eating food containing pigment, such as red heart dragon fruit, it makes the color of urine a little reddish-brown, but it is not accompanied by other physical symptoms, and the color of urine will gradually lighten until it disappears as the body metabolizes. In addition, the color of the urine is a little red-brown may be carnal hematuria, may be the impact of drugs or exercise overload caused by transient symptoms, if the symptoms continue not to relieve, most of the urinary system diseases related, a few with systemic diseases and other related. I. Drug influence: such as taking aminoglycoside antibiotics, amphotericin B, cyclophosphamide and vincristine, etc., which can easily damage the glomerulus and renal tubules and cause lesions, thus making the urine reddish-brown, and the symptoms can appear after the drug is used, and can generally be gradually relieved after stopping the drug. Second, strenuous exercise: common in people who do not often exercise and suddenly exercise, due to the violent strenuous exercise, the kidney blood flow reduced glomerular ischemia, lack of oxygen, while the increase in blood lactic acid, making the glomerular permeability increased, red blood cells into the urine, resulting in reddish-brown urine, generally stop strenuous exercise can be gradually relieved, if necessary, the application of drug therapy. Third, urinary system diseases: patients commonly may be related to urinary tract infections and urinary tract stones. If there are lesions in the kidneys, ureter and bladder, inflammation or stones may cause the mucous membrane of the urinary tract to break down and the patient may experience the symptoms of hematuria in the naked eye, making the color of urine a little reddish-brown. Besides, it may be accompanied by symptoms such as fever, pain in the lower back and abdomen, general edema, etc. If the symptoms worsen, it may be related to diseases such as renal pelvis cancer and kidney cancer, which require timely consultation at hospitals. Systemic diseases: 1. Immune diseases: When patients have immune diseases and autoimmune diseases, such as systemic lupus erythematosus and rheumatoid arthritis, etc. invade the kidneys, they may have the symptom that the urine is a little red-brown. Systemic lupus erythematosus may also show symptoms such as butterfly erythema and nasal mucosal ulcers, while rheumatoid arthritis mainly shows pain at the joints. 2. Infectious diseases: If patients have infectious diseases such as scarlet fever and sepsis, bacterial invasion of the urinary system leads to inflammation of the kidneys and other organs, which may lead to a little reddish-brown urine, and patients may also have fever, headache, general malaise and rash. Performance; 3, blood diseases: patients suffering from blood diseases, such as leukemia, allergic purpura and other diseases, may affect the body’s blood clotting function, resulting in local organ bleeding, may also lead to the appearance of the symptom, accompanied by the appearance of other parts of the bleeding spot. In addition, diseases of adjacent organs of the urinary tract, commonly including pelvic inflammatory disease, cervical cancer and vaginitis in women, and acute and chronic prostatitis and vesiculitis in men, may also cause urine to be a little red-brown. If a patient has a little red-brown urine, he or she should actively go to the hospital for routine urine examination to screen the location and cause of the lesion and receive targeted treatment to avoid delaying the condition. Patients should pay attention to local hygiene and cleanliness in daily life, drink more water, try to avoid holding urine, and maintain good habits and stable emotions to facilitate recovery.