Why do I need a sodium blood test? Your health care provider may have ordered a sodium blood test as part of your regular checkup or if you have symptoms of too much sodium (hypernatremia) or too little sodium (hyponatremia) in your blood. Symptoms of high sodium levels (hypernatremia) include: Excess thirst.

What is normal serum sodium level?

A normal blood sodium level is between 135 and 145 milliequivalents per liter (mEq/L). Hyponatremia occurs when the sodium in your blood falls below 135 mEq/L. Many possible conditions and lifestyle factors can lead to hyponatremia, including: Certain medications.

What happens if serum sodium is high?

Hypernatremia typically causes thirst. The most serious symptoms of hypernatremia result from brain dysfunction. Severe hypernatremia can lead to confusion, muscle twitching, seizures, coma, and death.

What happens if serum sodium is low?

Hyponatremia is a condition characterized by low levels of sodium in the blood. Its symptoms are similar to those caused by dehydration. In severe cases, the brain may swell, which can lead to headaches, seizures, coma, and even death ( 27 ).

What are the symptoms of high sodium levels?

The main symptom of hypernatremia is excessive thirst. Other symptoms are lethargy, which is extreme fatigue and lack of energy, and possibly confusion. Advanced cases may also cause muscle twitching or spasms. That’s because sodium is important for how muscles and nerves work.

What are symptoms of low potassium?

  • Constipation.
  • Feeling of skipped heart beats or palpitations.
  • Fatigue.
  • Muscle damage.
  • Muscle weakness or spasms.
  • Tingling or numbness.

Why do you get low sodium?

A low sodium level has many causes, including consumption of too many fluids, kidney failure, heart failure, cirrhosis, and use of diuretics. Symptoms result from brain dysfunction.

How long does it take to recover from low sodium levels?

Generally, low sodium is asymptomatic (does not produce symptoms), when it is mild or related to your diet. It can take weeks or months for you to experience the effects of low salt in your diet—and these effects can be corrected by just one day of normal salt intake.

How do you increase sodium levels in your blood?

Intravenous (IV) fluids with a high-concentration of sodium, and/or diuretics to raise your blood sodium levels. Loop Diuretics – also known as “water pills” as they work to raise blood sodium levels, by making you urinate out extra fluid.

Can low sodium cause high blood pressure?

It also helps maintain both intercellular and intracellular fluid balances. Too much sodium (> 145 mEq/L) can adversely affect these fluid balances and thus contribute to high blood pressure. But, too little sodium (< 135 mEq/L) can have detrimental effects as well.

Article first time published on

Will eating salt help hyponatremia?

In elderly patients with a diet poor in protein and sodium, hyponatremia may be worsened by their low solute intake. The kidney’s need to excrete solutes aids in water excretion. An increase in dietary protein and salt can help improve water excretion.

What medications can cause high sodium levels?

  • Diuretics.
  • Sodium bicarbonate.
  • Sodium chloride.
  • Corticosteroids.
  • Anabolic steroids.
  • Adrenocorticotrophic steroids.
  • Androgens.
  • Oestrogens.

What is considered high sodium level?

As a general guide: 5% DV or less of sodium per serving is considered low, and 20% DV or more of sodium per serving is considered high.

Why would sodium be high?

In hypernatremia, the level of sodium in blood is too high. Hypernatremia involves dehydration, which can have many causes, including not drinking enough fluids, diarrhea, kidney dysfunction, and diuretics.

What causes high sodium levels in elderly?

Older people are predisposed to developing hypernatremia because of age-related physiologic changes such as decreased thirst drive, impaired urinary concentrating ability, and reduced total body water. Medications may exacerbate this predisposition.

What are the 10 signs of low potassium?

  • Weakness, tiredness, or cramping in arm or leg muscles, sometimes severe enough to cause inability to move arms or legs due to weakness (much like a paralysis)
  • Tingling or numbness.
  • Nausea or vomiting.
  • Abdominal cramping, bloating.
  • Constipation.
  • Palpitations (feeling your heart beat irregularly)

What diseases cause low potassium?

  • Cushing’s syndrome.
  • Gitelman syndrome.
  • Liddle syndrome.
  • Bartter syndrome.
  • Fanconi syndrome.

Is low potassium serious?

Normally, your blood potassium level is 3.6 to 5.2 millimoles per liter (mmol/L). A very low potassium level (less than 2.5 mmol/L ) can be life-threatening and requires urgent medical attention.

What cancers cause low sodium levels?

Hyponatremia is commonly seen in patients with lung, head and neck, gastrointestinal, breast, kidney cancers and lymphoma.

Can low sodium levels cause shortness of breath?

Tiredness. Shortness of breath. Headaches. Swelling or fluid buildup in certain parts of your body.

What foods should you eat if you have low sodium?

Low-Sodium Foods to Enjoy Fresh and frozen vegetables (without sauces): Greens, broccoli, cauliflower, peppers, etc. Fresh, frozen or dried fruits: Berries, apples, bananas, pears, etc. Grains and beans: Dried beans, brown rice, farro, quinoa and whole wheat pasta.

Can low sodium affect your heart?

One study found that less than 3,000 mg of sodium per day is linked to an increased risk of dying from heart disease, including heart attacks and strokes ( 14 ). Disturbingly, another study reported a higher risk of dying from heart disease at the lower sodium levels that many guidelines currently recommend ( 15 ).

Does sodium levels affect your kidneys?

A high salt diet will alter this sodium balance, causing the kidneys to have reduced function and remove less water resulting in higher blood pressure. This puts strain on the kidneys and can lead to kidney disease.

Can low sodium affect your eyes?

Hyponatremia can cause neurological problems such as seizures however its ocular side effects are not commonly encountered in daily practice. A decrease in sodium levels can cause choroidal swelling leading to hyperopic shifts.

How do elderly maintain sodium levels?

  1. Adjust or change medications.
  2. Cut back on water and fluid consumption.
  3. Seek treatment for underlying conditions or diseases.
  4. Eat foods that are high in sodium.
  5. Increase dietary protein to aid in water excretion.
  6. Infusing an intravenous sodium solution.

Which fruit has high sodium?

Products made from these fruits like applesauce, apple juice, dried apples, jams made from apples and guavas are also sodium-rich. Avocados, papaya, mangoes, carambola, pineapple, bananas, watermelons and pears also contain sodium but in low quantities. Celery and beet are two vegetables with high sodium content.

Can drinking water lower sodium levels?

The results of the study revealed that people who increased their consumption of plain water by one to three cups daily lowered total energy intake by 68-205 calories each day and their sodium intake by 78–235 g each day. Water also gets rid of waste through urination, perspiration and bowel movements.

Can high sodium cause dizziness?

A high sodium intake can cause lightheadedness upon standing, according to new research published in the Journal of Clinical Hypertension. Shoot for no more than than 2,300 milligrams of sodium per day to reduce the risk of lightheadedness, as well as for other issues like high blood pressure.

Does high sodium cause high blood pressure?

The body needs a small amount of sodium to function, but most Americans consume too much sodium. High sodium consumption can raise blood pressure, and high blood pressure is a major risk factor for heart disease and stroke. Most of the sodium we consume is in the form of salt.