BloodTestEasy

Sodium 152 mEq/L

= 152 mmol/L in SI units

Moderately high

Contact your doctor promptly to discuss this result.

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  • Critically low (severe hyponatremia)
  • Severely low
  • Moderately low
  • Mildly low
  • Normal
  • Borderline high
  • Moderately high
  • Severely high
  • Critically high (severe hypernatremia)
Your band
Moderately high · 15–155 mEq/L
Distance from typical range
6 mEq/L above 146
SI units
152 mEq/L = 152 mmol/L

What 152 mEq/L means

A sodium of 152 mEq/L is moderately high (moderate hypernatremia). It points to a real water deficit and deserves same-day contact with your clinician.

In an adult who can feel thirst and drink freely, the body rarely lets sodium climb above 150 mEq/L — so a value in this range usually means genuine fluid losses, limited fluid intake, or a problem with how the kidneys hold on to water. Many people at this level feel thirsty, tired, or a little foggy; older or frail adults, and anyone who cannot drink freely, can deteriorate faster. This is usually correctable once the reason is found, but it should be confirmed and explained promptly rather than left for a routine visit.

Most US labs report a normal adult sodium range of about 135 to 145 mEq/L (the convention used by MedlinePlus and Mayo Clinic); some labs use 136 to 145. Critical (panic) cutoffs vary slightly between labs: sodium at or below 120 mEq/L is widely treated as a critical low, and 160 mEq/L and above as a critical high, though some labs flag highs starting at 155.

Common causes

  • Dehydration from vomiting, diarrhea, or fever
  • Not drinking enough (illness, blunted thirst, or limited access to fluids)
  • Diuretics or laxatives combined with low fluid intake
  • Uncontrolled diabetes causing heavy urination (osmotic diuresis)
  • Heavy sweating without adequate water replacement
  • Early or partial diabetes insipidus — the kidneys pass more dilute urine than they should

Symptoms that can go with it

  • Thirst
  • Dry mouth and skin
  • Fatigue or lethargy
  • Mild irritability or trouble concentrating
  • Darker, less frequent urine (or unusually large volumes of pale urine if the kidneys are the problem)
  • Lightheadedness, especially on standing
  • Sometimes no symptoms

Sensible next steps

  1. Contact your clinician today to review this result and arrange a prompt repeat test.
  2. Drink water in regular, steady amounts unless a doctor has restricted your fluids — steady rehydration is safer than forcing large volumes at once.
  3. Mention recent illness, fever, diarrhea, or heavy sweating, and how much you have been able to drink.
  4. Bring your medication list, especially diuretics, laxatives, and lithium.
  5. Go to urgent care or the ER if you develop confusion, cannot keep fluids down, or the person tested is elderly, frail, or unable to drink on their own.

Frequently asked questions

Is 152 mEq/L a normal sodium level?

No — 152 mEq/L is moderately above the normal 135–145 mEq/L range and points to a real water deficit. Contact your clinician today to confirm it and find the cause.

Is a sodium level of 152 dangerous?

It can be, especially in older or frail adults. 152 mEq/L indicates a water deficit that healthy thirst normally prevents, so something is driving it — it needs same-day medical review.

What causes low blood sodium (hyponatremia)?

Low sodium almost always means too much water relative to sodium, not too little salt in the diet. Common causes include thiazide diuretics (water pills), antidepressants such as SSRIs, drinking large amounts of water, vomiting or diarrhea, SIADH (excess antidiuretic hormone from lung, brain, or medication causes), and heart, liver, kidney, thyroid, or adrenal conditions. Very high blood glucose can also dilute the measured sodium. Your clinician uses urine tests and your fluid status to sort out which applies to you.

Can drinking too much water cause low sodium?

Yes. Drinking water faster than your kidneys can excrete it dilutes your blood sodium — this is water intoxication. It is a known risk during endurance events when people drink heavily without eating, in people who drink very large volumes habitually, and when illness or medications limit how much water the kidneys can release. For most healthy people, drinking to thirst is the safest guide; there is no need to force extreme volumes of water.

Does eating too much salt raise my blood sodium level?

Usually not. A salty diet makes you thirsty and makes your body hold water, which raises blood pressure and causes puffiness — but the blood sodium concentration typically stays normal because thirst and the kidneys rebalance it. High blood sodium (hypernatremia) is almost always a shortage of water rather than an excess of dietary salt. That said, a lower-salt diet is still worthwhile for blood pressure and heart health, which is a separate issue from this test result.

Should I go to the ER for a sodium of 152 mEq/L?

Possibly. Contact your clinician today; go to urgent care or the ER if you cannot be seen, cannot keep fluids down, or the person tested is elderly, frail, or confused.

Why is my sodium low if I eat plenty of salt?

Because blood sodium is a concentration, not a measure of salt intake. Low sodium nearly always means your body is holding on to extra water that dilutes the sodium — from medications, hormones like ADH, drinking large volumes, or conditions such as heart, liver, or kidney disease. Adding more salt to your food rarely fixes it and can be harmful in some of these conditions, so the right move is finding the cause with your clinician rather than changing your diet on your own.

Check a different Sodium value

Related values on your lab report

Sources

Educational information, not medical advice. Reference ranges vary between labs — always compare with the range printed on your own report and discuss results with your doctor. Full disclaimer