Q I heard impetigo can cause kidney complications — should I keep monitoring even after full recovery?
A Rarely, glomerulonephritis (kidney inflammation) can develop after streptococcal impetigo, so if swelling, blood in the urine, or decreased urination appears within 1 to 3 weeks after recovery, you should go to the hospital immediately. With proper treatment, most recover without complications, and taking antibiotics lowers this risk.
Detailed Answer
Impetigo caused by group A streptococcus can, rarely, lead to glomerulonephritis (post-streptococcal glomerulonephritis, PSGN) within 1 to 3 weeks after infection. The main symptoms are swelling of the face, especially around the eyes, urine that is reddish or cloudy, and decreased urine output. This complication does not occur with Staphylococcus aureus impetigo, and even with streptococcal infection the risk is lowered by appropriate antibiotic use. For 3 weeks after recovery, observe the child's facial swelling and urine condition, and if suspicious symptoms appear, seek care from nephrology or pediatrics.
Korean Medicine Clinic Perspective
At Dongjedang, we consider it important to prevent any heat-toxin remaining after recovery from streptococcal impetigo from migrating to the heart or kidneys. Along with clearing heat and resolving toxin, supportive treatment aimed at reducing the burden on the kidneys may be added; however, if symptoms suspicious for glomerulonephritis actually appear, visiting a Western hospital immediately comes first.
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