Increased sources or decreased destinations of ammonia during metabolism in the body can lead to elevated blood ammonia. 1. Excessive intake, such as a high protein diet, and high intestinal bacterial catabolism, such as upper gastrointestinal bleeding, are possible causes of increased sources. 2. Possible cases of increased blood ammonia due to decreased outlet include liver diseases such as cirrhosis, severe hepatitis, hepatic encephalopathy, liver cancer and other liver diseases that lead to urea synthesis disorders; congenital deficiency of ornithine cycle-related enzymes that lead to urea metabolism disorders; and ammonia absorbed through the intestines in cirrhosis and portal hypertension that goes through the collateral circulation directly into the body circulation, which leads to increased blood ammonia, and so on. If you have abnormal elevation of blood ammonia, you need to go to the hospital as soon as possible, and the doctor will formulate individualized diagnosis and treatment plan according to the specific condition, so as to avoid delaying the condition.