Glomerulonephritis

Also called Nephritis

Glomerulonephritis is damage to the tiny filters inside the kidneys (glomeruli), often caused by the immune system attacking healthy tissue. It may cause no symptoms and is often found when a urine test shows blood or protein. Some types are mild, while others can lead to kidney failure.

Last updated Nov 9, 2026

What it is

It can be linked to infections or to conditions such as lupus or vasculitis, but often the cause is not known.

Treatment depends on the type and may include controlling blood pressure, medicines that calm the immune system, and diet changes.

Common signs

  • Often no symptoms
  • Pink, red or brown pee
  • Foamy pee
  • Swelling of the legs, ankles or face
  • High blood pressure

How it is usually diagnosed

  • Urine tests for blood and protein
  • Blood tests of kidney function
  • Kidney ultrasound
  • A kidney biopsy

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Urine test results over time
  • Kidney function results (creatinine, eGFR)
  • Kidney biopsy reports
  • Nephrology letters and blood pressure records

Questions to ask your doctor

  • Which type of glomerulonephritis do I have?
  • How well are my kidneys working?
  • How often should my kidneys be checked?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • Peeing much less than usual, severe swelling or breathlessness: get urgent medical help

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

Sources