Very yellow urine color may be caused by physiological factors such as drinking too little water, improper diet, and may also be caused by diseases such as jaundice hepatitis and cholecystitis. 1. Physiological factors: If the amount of water consumed in recent life is not up to standard, resulting in insufficient water in the body, making the urine concentrated, it is easy to change the color of urine, the urine color is very yellow. Secondly, if you eat too much food rich in vitamin B2, excess vitamin B2 will be discharged through the urine, thus deepening the color of urine, are normal physiological phenomena, do not worry too much. 2. Jaundice hepatitis: the causes of this disease include viral infections such as hepatitis B virus and EB virus, as well as drugs, alcohol, autoimmune injuries, etc. It is often triggered by overwork, staying up all night, overeating and other factors, which leads to weakness, pain in the liver area, yellowing of the urine, and loss of appetite. 3. Cholecystitis: the occurrence of this disease is related to biliary obstruction, biliary stasis secondary infection, the main cause of biliary obstruction is bile duct stones. Secondly, it is also related to improper diet, gallbladder ischemia, metabolic disorders and other factors. It manifests as abdominal cramps, nausea, vomiting and other symptoms, and some patients will have jaundice of varying degrees of severity, which can manifest as very yellow urine color, yellow skin or eye stains. In addition to this, very yellow urine color may be the result of taking high doses of drugs such as fenazopyridine and salazosulfapyridine. Or it may be caused by other diseases such as hemolytic jaundice or chronic renal insufficiency. There are more causes of very yellow urine, you need to go to the hospital, do the relevant examination, to clarify the specific cause of the disease.