Nephrotic syndrome is caused by glomeruli injury in the kidneys. These are the microscopic blood arteries that filter waste and surplus water from the blood and deliver it to the bladder in the form of urine.
Protein is kept in the body by your glomeruli. Protein escapes into the urine when they are broken. A healthy kidney allows less than 1 gramme of protein into the urine every day. The glomeruli in nephrotic syndrome allow 3 grammes or more of protein to seep into the urine throughout a 24-hour period.
Nephrotic syndrome can occur in conjunction with other health issues, such as diabetes-related kidney disease and immunological diseases. It can also occur as a result of viral infections.