There are many reasons for occult blood in urine, which may be urinary tract infection, urinary calculi, or poor renal filtration. The specific reason can be obtained through inspection. According to the regimen of traditional Chinese medicine, drinking tea is to nourish the spleen and stomach, as long as you don't drink it on an empty stomach. Drinking on an empty stomach is easy to hurt your stomach, but be careful not to drink strong tea or overnight tea. Don't drink tea for the first time, because the residual germs or impurities stuck to tea may not be removed. Tea should be drunk half an hour after meals. Drinking tea on an empty stomach hurts the stomach, and drinking tea immediately after meals increases the burden on the stomach. And drinking tea after drinking hurts the kidneys. Many people often use strong tea to sober up and regard tea as an important effect of drinking tea. However, scientific research shows that tea can not sober up, on the contrary, it may aggravate the symptoms of drunkenness. Alcohol is strongly irritating to the cardiovascular system, and strong tea also has the effect of exciting the heart. If tea and wine are added together to stimulate the heart, it will do great harm to the heart, and it is even more difficult to predict what will happen to the heart of people with poor function. The harm of drinking strong tea after drinking does not stop there. If you use strong tea to sober up after drinking, theophylline in tea will stimulate the kidney to accelerate diuresis. Due to the rapid excretion, acetaldehyde, which can not be completely oxidized and decomposed, will enter the kidney in advance and stimulate the kidney. The kidney is stimulated by tea and acetaldehyde, resulting in excessive urination and overload of the kidney. Usually, it will damage the kidneys. At the same time, due to the decrease of water in the body, harmful substances remain in the kidneys, which may produce stones and cause double harm to the body. The urine occult blood is positive, so you'd better go to the hospital to check the reason.