Nephrology mainly focuses on kidney diseases: the first one is nephritis, such as acute nephritis, acute nephritis and chronic nephritis. The second, nephrotic syndrome, common primary nephrotic syndrome and secondary nephrotic syndrome, secondary nephrotic syndrome includes systemic lupus erythematosus nephritis, hepatitis B-associated nephropathy and diabetic nephropathy. Thirdly, tubular diseases, such as acute tubular necrosis and tubular acidosis are common. The fourth, such as chronic renal failure and uremic syndrome, all belong to the nephrology department. In addition, hereditary diseases such as polycystic kidney, Alport syndrome, urinary tract infections, and renal cysts are also included in the nephrology department.