The reddish yellow urine in the morning may be caused by physiological factors, urinary tract injuries, acute urinary tract infections and other factors. 1. physiological factors: in the evening consumed a lot of red dragon fruit and other foods, less urination at night, can lead to the concentration of urine, urine in the morning when urinating yellow and red, accompanied by mild odor, belong to the physiological factors, drink more water and more urination, can be recovered on their own. 2. urinary tract injury: sexual intercourse at night, urinary tract stones, etc., localized damage to the urinary tract, may cause local bleeding, bleeding is small, mixed with concentrated urine, it will make the urine yellow and red, may also be accompanied by mild pain. 3. Acute urinary tract infections: may be related to poor hygiene, unclean sex and other factors, the onset of more acute, more serious infection, will make the urine with blood and the presence of purulent secretions, which can lead to yellow and red urine in the morning, accompanied by frequent urination, urinary urgency, urinary pain and other symptoms. There are other diseases that can cause reddish-yellow urine in the morning, such as urinary tract tumors, etc. It is recommended to consult a doctor in time for examination and treatment.