Article · 4 min read
Bad Breath and a Metallic Taste in Kidney Disease
Why advanced kidney disease can cause a metallic taste and bad breath.
Last updated: 24/9/2026
A build-up of waste products in the blood can cause a metallic taste in the mouth and a urine-like or ammonia odour on the breath.
What helps
Good oral hygiene, rinsing the mouth, and good dialysis control of waste products can reduce it.
Frequently Asked Questions
Is bad breath a sign of kidney failure?
It can be a late sign, but has many other causes. Blood tests clarify.
Sources
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This page is for general education only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified doctor about your specific condition.