24-Hour Urine Sweat Rate (or Sweat Volume Measurement)
This test measures the total amount of sweat produced over a 24-hour period, often used to assess conditions affecting sweat regulation.
["Understanding your sweat output can help diagnose or monitor conditions like hyperhidrosis or sweat gland disorders."]
Key facts at a glance
- LOINC
- 28377-0
- Short code
- DAYSWEATS
- Synonyms
- —
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- reported-hiv-ssc
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why This Test Is Done
Doctors may order a 24-hour urine sweat test if you have symptoms like excessive sweating (hyperhidrosis), unusual sweat patterns, or suspected sweat gland disorders. It helps evaluate how much sweat your body produces over time.
How the Test Works
You’ll wear a special device that collects all urine and sweat for 24 hours. The collected fluid is then analyzed to estimate total sweat volume.
Sample Collection Process
You’ll need to follow specific instructions to ensure accurate results, such as wearing the collection device continuously and keeping it dry. Some patients may need to avoid certain foods or medications that could affect sweat composition.
What the Results Mean
Results are typically reported as a total volume of sweat produced. Abnormal results may indicate conditions like primary hyperhidrosis, cystic fibrosis, or other metabolic or endocrine disorders.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This test helps diagnose conditions affecting sweat regulation, such as excessive sweating (hyperhidrosis) or sweat gland dysfunction. It may also be used to assess metabolic disorders or evaluate responses to treatments for sweat-related issues.
Frequently asked questions
What does a high sweat rate mean?
A normal sweat rate typically falls within expected ranges for your body and health status. However, individual results can vary, so your doctor will consider your overall health and medical history.
Follow your doctor’s specific instructions, but generally, avoid foods or drinks that might alter sweat composition (e.g., caffeine, alcohol) for 24 hours before the test.
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy