Rare diseases · Sign or symptom
Dehydration
HP:0001944
In everyday care
Most people with this sign do not have a rare disease — it appears in common conditions far more often. These general reference pages cover the same topic:
Rare diseases that can present with this61
Very common80–99%
15- 46,XY difference of sex development-adrenal insufficiency due to CYP11A1 deficiency
- Arginine vasopressin deficiency
- Colchicine poisoning
- Cystinosis
- Enteric anendocrinosis
- Glucose-galactose malabsorption
- Infantile nephropathic cystinosis
- Inherited isolated adrenal insufficiency due to partial CYP11A1 deficiency
- Isolated permanent neonatal diabetes mellitus
- Oculocerebrorenal syndrome of Lowe
- Paternal uniparental disomy of chromosome 6 syndrome
- Transient neonatal diabetes mellitus
- Vitamin B12-responsive methylmalonic acidemia
- Vitamin B12-unresponsive methylmalonic acidemia
- Vitamin B12-unresponsive methylmalonic acidemia type mut-
Common30–79%
13- Addison disease
- Beta-ketothiolase deficiency
- Cholera
- Chronic hiccup
- Classic congenital adrenal hyperplasia due to 21-hydroxylase deficiency
- Congenital adrenal hyperplasia due to 3-beta-hydroxysteroid dehydrogenase deficiency
- Congenital enterocyte heparan sulfate deficiency
- Congenital tufting enteropathy
- Early-onset familial hypoaldosteronism
- Generalized pseudohypoaldosteronism type 1
- Microvillus inclusion disease
- Shigellosis
- VIPoma
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: Exsiccosis
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.