Rare diseases · Sign or symptom
Fish odor
Fishy odor
HP:0410020
What it means
Body odor characterized by an offensive body odor and the smell of rotting fish due to the excessive excretion of trimethylamine (TMA) in the urine, sweat, and breath of affected individuals.
Rare diseases that can present with this2
The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.
Part of the broader category
Also called: Fishy body odor · Fishy body odour · Fishy odour
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Start free with EleplanThis page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.