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Medical Laboratories

Serum Sodium Test

A precise measurement of blood sodium levels to evaluate fluid and electrolyte balance, helping detect dehydration or kidney-related issues for optimal health.

Trusted medical contentUpdated: 25-04-2026Views: 66LHL-95

View service availability

Home Service Available

Service typeLaboratory Test (Blood)

Duration10-15 minutes

Fasting / preparationFasting is not required

Home serviceAvailable

Medical notice: this information is for education and service understanding. It is not a diagnosis or a recommendation for an unnecessary procedure.

About this service

Serum Sodium Test is a laboratory test used to measure the sodium level in the blood, which is one of the body’s essential electrolytes. Sodium plays a vital role in regulating fluid balance and blood pressure, as well as supporting nerve and muscle function. A blood sample is collected and analyzed to determine the sodium level, which can reflect a person’s overall health status. This test is used to evaluate various medical conditions, such as dehydration, electrolyte imbalances, kidney failure, and high blood pressure. The results help doctors make appropriate medical decisions, such as adjusting fluid intake or medications. Patients may be asked to avoid certain medications or supplements before the test to ensure accurate results. This test is an important tool for diagnosing and monitoring numerous health conditions.

Test purpose

Blood sodium level: Determines the concentration of sodium in the serum, which is important for regulating blood pressure and fluid balance.
Fluid balance status: Helps assess whether there is dehydration (high sodium levels) or fluid retention (low sodium levels).
Kidney disorders: Abnormal results may indicate kidney function issues, as the kidneys play a key role in regulating sodium levels.
Hormonal disorders: Abnormal sodium levels can suggest problems with the adrenal glands, such as Addison’s disease or Cushing’s syndrome.
Effects of certain medications: Results can reflect the impact of medications on sodium levels, such as diuretics or drugs used to treat high blood pressure.
Other medical conditions: Abnormal levels may also indicate conditions like diabetes or heart disease.

Recommended groups

Individuals experiencing dehydration symptoms: Such as excessive thirst, dry mouth, or reduced urination.
Patients with kidney problems: For ongoing monitoring of kidney function and electrolyte balance.
People with chronic medical conditions: Such as diabetes or high blood pressure, since sodium levels can affect the management of these conditions.
Patients taking certain medications: Such as diuretics, which may influence sodium levels.
Individuals with unclear symptoms: Such as general weakness, dizziness, or confusion, which may indicate fluid balance disturbances.
Patients with hormonal disorders: Such as Addison’s disease or Cushing’s syndrome, as hormones can affect sodium levels.
Individuals who have undergone surgery: Especially major surgery, as fluids and medications used during the procedure can impact sodium levels.
Athletes or people exposed to extreme heat: To monitor sodium levels after intense physical activity or prolonged heat exposure.

Indicative symptoms

Excessive thirst: May signal dehydration or a fluid balance disorder.
Dry mouth: Could indicate low fluid or sodium levels in the body.
Reduced urination: Urinating less than usual may point to fluid retention or kidney issues.
Dizziness or lightheadedness: Can result from low blood pressure due to low sodium levels.
General weakness: Feeling weak or fatigued may indicate electrolyte imbalance.
Muscle cramps: Can occur due to sodium deficiency or changes in fluid levels.
Confusion or altered consciousness: May result from abnormal sodium levels affecting brain function.
Abdominal pain or swelling: Could indicate kidney problems or fluid retention.
Sudden weight gain: May suggest fluid retention.
Symptoms related to certain medications: Such as diuretics, which can affect sodium levels in the body.

Normal levels

Blood sodium levels typically range between 135 and 145 mmol/L.
Above 145 mmol/L: Known as Hypernatremia, which may indicate dehydration or excessive salt intake.
Below 135 mmol/L: Known as Hyponatremia, which may indicate fluid retention, kidney problems, or the effects of certain medications.
Interpretation: Test results should be interpreted by a doctor based on symptoms and medical history, as abnormal levels may require further tests or monitoring.
Influencing Factors: Various factors can affect sodium levels, including diet, hydration status, and medications.

What is included?

✓Sodium in serum test
✓The optimal health guidance based on the result.
✓Personal support services from Lahalak

Conditions and notices

Fasting is not required
The terms and conditions announced on the "Lahalak" medical platform apply.
There are no special conditions for the service other than those mentioned.

Frequently Asked Questions

Short answers to the FAQs published with this service.

What is a Serum Sodium Test?

It is a test used to measure the sodium level in the blood, helping to assess fluid balance and kidney function.

Why is this test performed?

It is conducted to diagnose conditions such as dehydration, fluid retention, high blood pressure, and to evaluate kidney health.

How is the blood sample collected?

The sample is usually collected by drawing blood from a vein and generally does not require special preparation.

Is any preparation needed before the test?

Typically, no special preparation is needed, but you may be asked to avoid certain medications.

What are the normal blood sodium levels?

Normal blood sodium levels typically range between 135 and 145 mmol/L.

What do abnormal results mean?

High levels may indicate dehydration or high blood pressure, while low levels may suggest fluid retention or kidney problems.

How long does it take to get test results?

Results are usually available within one to two days, depending on the laboratory.

Is the test painful?

Some discomfort may occur during blood draw, but it is usually not painful.

What should I do if my test results are abnormal?

It is recommended to consult a doctor to discuss the results and appropriate treatment options.

Can the test be performed at home?

No, this test must be conducted at a reliable medical facility to ensure accurate results.

Service resources and references

References and additional resources

Reference material and files associated with this service when available.

Scientific references

Popkin, B. M., D’Anci, K. E., & Rosenberg, I. H. (2010). Water, hydration, and health. Nutrition Reviews, 68(8), 439–458.
Armstrong, L. E. (2007). Assessing hydration status: The elusive gold standard. Journal of the American College of Nutrition, 26(5 Suppl), 575S–584S.
Sawka, M. N., & Montain, S. J. (2000). Fluid and electrolyte supplementation for exercise heat stress. The American Journal of Clinical Nutrition, 72(2 Suppl), 564S–572S.

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Didn’t find the service?

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Important Notice:

Content on LahaLak is provided for educational purposes only. It is not a medical diagnosis, prescription, or substitute for consulting a qualified clinician. Medical decisions should not be made from this content alone.

Content reviewed according to the LahaLak Quality Charter.Editorial Policy & Medical Standards

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Medical Laboratories

Serum Sodium Test

A precise measurement of blood sodium levels to evaluate fluid and electrolyte balance, helping detect dehydration or kidney-related issues for optimal health.

Trusted medical contentUpdated: 25-04-2026Views: 66LHL-95

View service availability

Home Service Available

Service typeLaboratory Test (Blood)

Duration10-15 minutes

Fasting / preparationFasting is not required

Home serviceAvailable

Medical notice: this information is for education and service understanding. It is not a diagnosis or a recommendation for an unnecessary procedure.

About this service

Test purpose

Blood sodium level: Determines the concentration of sodium in the serum, which is important for regulating blood pressure and fluid balance.
Fluid balance status: Helps assess whether there is dehydration (high sodium levels) or fluid retention (low sodium levels).
Kidney disorders: Abnormal results may indicate kidney function issues, as the kidneys play a key role in regulating sodium levels.
Hormonal disorders: Abnormal sodium levels can suggest problems with the adrenal glands, such as Addison’s disease or Cushing’s syndrome.
Effects of certain medications: Results can reflect the impact of medications on sodium levels, such as diuretics or drugs used to treat high blood pressure.
Other medical conditions: Abnormal levels may also indicate conditions like diabetes or heart disease.

Recommended groups

Individuals experiencing dehydration symptoms: Such as excessive thirst, dry mouth, or reduced urination.
Patients with kidney problems: For ongoing monitoring of kidney function and electrolyte balance.
People with chronic medical conditions: Such as diabetes or high blood pressure, since sodium levels can affect the management of these conditions.
Patients taking certain medications: Such as diuretics, which may influence sodium levels.
Individuals with unclear symptoms: Such as general weakness, dizziness, or confusion, which may indicate fluid balance disturbances.
Patients with hormonal disorders: Such as Addison’s disease or Cushing’s syndrome, as hormones can affect sodium levels.
Individuals who have undergone surgery: Especially major surgery, as fluids and medications used during the procedure can impact sodium levels.
Athletes or people exposed to extreme heat: To monitor sodium levels after intense physical activity or prolonged heat exposure.

Indicative symptoms

Excessive thirst: May signal dehydration or a fluid balance disorder.
Dry mouth: Could indicate low fluid or sodium levels in the body.
Reduced urination: Urinating less than usual may point to fluid retention or kidney issues.
Dizziness or lightheadedness: Can result from low blood pressure due to low sodium levels.
General weakness: Feeling weak or fatigued may indicate electrolyte imbalance.
Muscle cramps: Can occur due to sodium deficiency or changes in fluid levels.
Confusion or altered consciousness: May result from abnormal sodium levels affecting brain function.
Abdominal pain or swelling: Could indicate kidney problems or fluid retention.
Sudden weight gain: May suggest fluid retention.
Symptoms related to certain medications: Such as diuretics, which can affect sodium levels in the body.

Normal levels

Blood sodium levels typically range between 135 and 145 mmol/L.
Above 145 mmol/L: Known as Hypernatremia, which may indicate dehydration or excessive salt intake.
Below 135 mmol/L: Known as Hyponatremia, which may indicate fluid retention, kidney problems, or the effects of certain medications.
Interpretation: Test results should be interpreted by a doctor based on symptoms and medical history, as abnormal levels may require further tests or monitoring.
Influencing Factors: Various factors can affect sodium levels, including diet, hydration status, and medications.

What is included?

✓Sodium in serum test
✓The optimal health guidance based on the result.
✓Personal support services from Lahalak

Conditions and notices

Fasting is not required
The terms and conditions announced on the "Lahalak" medical platform apply.
There are no special conditions for the service other than those mentioned.

Frequently Asked Questions

Short answers to the FAQs published with this service.

What is a Serum Sodium Test?

It is a test used to measure the sodium level in the blood, helping to assess fluid balance and kidney function.

Why is this test performed?

It is conducted to diagnose conditions such as dehydration, fluid retention, high blood pressure, and to evaluate kidney health.

How is the blood sample collected?

The sample is usually collected by drawing blood from a vein and generally does not require special preparation.

Is any preparation needed before the test?

Typically, no special preparation is needed, but you may be asked to avoid certain medications.

What are the normal blood sodium levels?

Normal blood sodium levels typically range between 135 and 145 mmol/L.

What do abnormal results mean?

High levels may indicate dehydration or high blood pressure, while low levels may suggest fluid retention or kidney problems.

How long does it take to get test results?

Results are usually available within one to two days, depending on the laboratory.

Is the test painful?

Some discomfort may occur during blood draw, but it is usually not painful.

What should I do if my test results are abnormal?

It is recommended to consult a doctor to discuss the results and appropriate treatment options.

Can the test be performed at home?

No, this test must be conducted at a reliable medical facility to ensure accurate results.

Service resources and references

References and additional resources

Reference material and files associated with this service when available.

Scientific references

Popkin, B. M., D’Anci, K. E., & Rosenberg, I. H. (2010). Water, hydration, and health. Nutrition Reviews, 68(8), 439–458.
Armstrong, L. E. (2007). Assessing hydration status: The elusive gold standard. Journal of the American College of Nutrition, 26(5 Suppl), 575S–584S.
Sawka, M. N., & Montain, S. J. (2000). Fluid and electrolyte supplementation for exercise heat stress. The American Journal of Clinical Nutrition, 72(2 Suppl), 564S–572S.

Service availability

Choose a provider and branch

Each provider has one service price, then you choose from its available branches.

Labeeb & Search Tools

Let us help you

Use Labeeb smart tools to understand reports related to (Medical Laboratories), or search the platform directory directly.

Browse services alphabetically A-Z

LahaLak is here to help

Didn’t find the service?

We can help request the service and prepare your inquiry, or you can ask Labeeb to guide you to the most suitable category or service.

Phone call

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Your opinion matters

Was this content helpful?

Have a note?

Important Notice:

Content reviewed according to the LahaLak Quality Charter.Editorial Policy & Medical Standards

View service availability