Rare diseases · Sign or symptom
Hypernatremia
High blood sodium levels
HP:0003228
What it means
The concentration of sodium in the blood circulation is above the upper limit of normal.
Rare diseases that can present with this6
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: Elevated sodium(1+) concentration · Elevated sodium(1+) level · Elevated sodium(1+) level in blood · Increased sodium(1+) concentration · Increased sodium(1+) level · Increased sodium(1+) level in blood
Tracking symptoms like this for someone? Eleplan keeps symptoms, diagnoses, medications and every specialist in one plan.
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.