Post-infectious glomerulonephritis (PIGN) is a condition that causes inflammation (swelling) in the kidneys.
More about the urinary system and kidneys
PIGN happens in a few children, after they have an infection – usually in the throat, nose or sinuses, or occasionally the skin.
Many children with PIGN get better after a few weeks, without treatment. A few need to take medicines or have more intensive treatment.
PIGN is an acute condition, which means that it starts suddenly.
PIGN can happen in people of all ages, including children. It is not always clear why a few people get this condition after an infection. Doctors think it is caused by problems with the immune system, which normally protects the body against disease and infection.
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