Is Sodium 100 low, normal or dangerous? What does Sodium level 100 mean?

📅 Medical Review Date: April 19, 2026

Your Sodium level of 100 is a Low Sodium level.

A sodium level of 100 mmol/L usually means there is too much water or too little sodium in the body. It suggests hyponatremia. Low levels of sodium can cause nausea, headache, confusion, fatigue, muscle cramps, seizures, and coma in severe cases. This can be caused by heart failure, kidney disease, liver cirrhosis, or certain medications. Further tests are often needed to identify the cause and guide appropriate treatment.

Low Sodium levels may indicate underlying health problems. The normal range is typically between 136 mmol/L and 145 mmol/L. If your levels are outside this range, it's important to speak with a healthcare provider. Consulting a doctor is recommended to determine the cause and appropriate next steps.

The normal Sodium range for men is :136 - 145 mmol/L

Ideal values of Sodium depending on age (male) :

Age	Ideal Sodium value
<5 years	137.36
5-10 years	138.734
10-15 years	140.121
15-20 years	141.522
20-25 years	142.937
25-30 years	144.366
30-35 years	144.352
35-40 years	144.338
40-45 years	144.323
45-50 years	144.308
50-55 years	144.293
55-60 years	144.279
60-70 years	144.265
70-80 years	144.251
80-90 years	144.237
90-100 years	144.222
>100 years	144.207

*Ideal values are calculated based on our database of patient records

Misdiagnosis is more common than people think—and the consequences can be serious. Delayed treatment, unnecessary medication, or worse. If you want a second opinion on your blood work, one option is to upload it to a site like wholebodyprotocol.com, where world-class doctors review your results. They charge a small fee—around $90 (though you'll want to check the latest price as it fluctuates)—and email you a detailed report. With over 12 million people affected by misdiagnosis every year, that little bit of extra peace of mind can go a long way.

Some examples of conditions that increase or decrease Sodium levels include:

• Conditions that lead to too much anti-diuretic hormone (ADH)
• Cushing syndrome
• Nephrotic syndrome
• Diabetes insipidus
• Excess fluid buildup in the body (edema) caused by heart failure

Normal range of Sodium found among women :136-145 mmol/L

Ideal values of Sodium depending on age (female) :

Age	Ideal Sodium value
<5 years	137.401
5-10 years	138.816
10-15 years	140.246
15-20 years	141.691
20-25 years	143.15
25-30 years	144.624
30-35 years	144.609
35-40 years	144.593
40-45 years	144.577
45-50 years	144.562
50-55 years	144.547
55-60 years	144.532
60-70 years	144.517
70-80 years	144.502
80-90 years	144.486
90-100 years	144.47
>100 years	144.455

If you take a Sodium blood test and the results are not in the normal range (136-145 mmol/L), your physician may recommend more tests to figure out the problem. You might also get this test if your physician thinks you have some other disease.

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How the Sodium Test Is Done :

When your doctor orders a Sodium test, it involves a straightforward blood draw to measure your Sodium levels. A pathologist or lab technician will take a small sample of blood from a vein using a needle. Your Sodium test results are usually available within a few hours.

Medical References

• MedlinePlus – Sodium Blood Test
• MedlinePlus – Sodium blood test
• WebMD – Sodium Levels & Sodium Blood Test