Salty sweat: when it may need medical testing

All sweat contains some salt. Rarely, very salty sweat points to a medical condition. A case report published Nov 7, 2026 in Hormone Research in Paediatrics describes an infant whose salty-tasting skin was a clue to a rare genetic condition called isolated hyperchlorhidrosis. This brief page summarizes it.

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Key facts

MedlinePlus says sweat is liquid released from the sweat glands and that “this liquid contains salt” (MedlinePlus).
The sweat chloride test is the standard test used to diagnose cystic fibrosis, according to MedlinePlus (MedlinePlus).

The condition

Isolated hyperchlorhidrosis

The authors explain that isolated hyperchlorhidrosis is caused by changes in both copies of the CA12 gene, which encodes an enzyme involved in reabsorbing sodium and chloride in sweat glands. It leads to excessive salt loss and can mimic pseudohypoaldosteronism or cystic fibrosis (PubMed abstract).

When to ask

Talk to a doctor

In the case report, parents noticing salty-tasting skin was part of the history. If you notice this in a baby, mention it to a pediatrician; only medical testing can find the cause.

FAQ

Salty sweat: quick answers

Is salty sweat normal?

Yes. MedlinePlus says the liquid released by sweat glands contains salt, and suggests washing if salt from sweat has dried on your skin.

What medical conditions cause very salty sweat?

People with cystic fibrosis have higher amounts of sodium and chloride in their sweat, according to MedlinePlus. The 2026 case report describes a much rarer cause, isolated hyperchlorhidrosis.

How is salt in sweat tested?

With a sweat electrolytes (sweat chloride) test. MedlinePlus says the collection takes about an hour and is not painful.

Does antiperspirant help salty sweat?

No. Salty sweat is about what is in sweat, not how much you sweat. Antiperspirant does not treat salt loss; see a doctor.

The 2026 case report

A 5-month-old girl had irritability, lethargy, poor feeding, very low sodium (110 mEq/L) and high potassium (7.1 mEq/L). Tests first suggested pseudohypoaldosteronism, but low urinary sodium pointed to salt loss outside the kidneys. She had three more episodes, mostly in summer, and her parents consistently reported that her skin tasted salty (PubMed abstract).

Genetic testing found two previously unreported CA12 variants, one from each parent, and no disease-causing variants in the cystic fibrosis gene (CFTR) or genes linked to pseudohypoaldosteronism. By 19 months she had been free of episodes for nine months without disease-specific treatment, with normal growth and development.

Why this matters, and its limits

The authors say the case highlights considering isolated hyperchlorhidrosis in infants with recurrent salt loss when routine tests do not support pseudohypoaldosteronism or cystic fibrosis. This is a single-patient case report, read from the abstract. It is about salt in sweat, not the amount of sweat, and has nothing to do with antiperspirant use.

Sources

Educational information, not a diagnosis or medical advice. Sources were opened and read on Nov 9, 2026. Research summaries are based on the published abstract or full text as noted; they are not evidence for any Maxim product.

Concerned about salty skin in your child?

Talk with your pediatrician. Testing, not home remedies, finds the cause.

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Educational information only, not medical advice. This page does not promote any product for salty sweat or salt loss.