Patients with high blood creatinine can usually eat fish, but it is recommended to eat small amounts. There are physiological and pathological causes of high creatinine. The former is seen after strenuous exercise and drinking a lot of meat; the latter mainly includes diabetic nephropathy, chronic nephritis, lupus nephritis and so on. Elevated blood creatinine caused by kidney disease should be low-salt, low-fat, high-quality, low-protein diet. Fish is rich in high quality protein and can be consumed in small amounts to supplement the protein needed by the body. It is recommended that patients with high creatinine go to the hospital in time, complete the relevant examinations under the guidance of a professional physician, clarify the cause of the disease, and formulate a diet and medication program, etc. Do not self-medicate.