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What causes low sodium and potassium?

Author

Daniel Moore

Published Jan 24, 2026

kidney disease or kidney failure. liver disease. heart problems, including congestive heart failure. adrenal gland disorders, such as Addison's disease, which affects your adrenal gland's ability to regulate the balance of sodium, potassium, and water in your body.

What causes low potassium and low sodium levels?

Hormonal changes. Adrenal gland insufficiency (Addison's disease) affects your adrenal glands' ability to produce hormones that help maintain your body's balance of sodium, potassium and water. Low levels of thyroid hormone also can cause a low blood-sodium level.

What happens if sodium and potassium are low?

Potassium, Sodium, and the Risk of Heart Disease and Stroke

Consuming too little potassium and too much sodium can increase your risk of heart disease and stroke. Lowering blood pressure reduces your risk of heart disease and stroke.

What causes sodium levels to drop low?

Kidney problems

So, the most common reason for low sodium is a kidney problem. When the kidneys are not functioning normally, which can be seen in chronic kidney disease or even temporary dehydration, the body holds too much water. And the proportion of sodium compared to water in the body lowers the sodium level.

Can a person recover from low sodium levels?

Hyponatremia can result from multiple diseases that often are affecting the lungs, liver or brain, heart problems like congestive heart failure, or medications. Most people recover fully with their doctor's help.

18 related questions found

How do you fix sodium deficit?

In patients with severe symptomatic hyponatremia, the rate of sodium correction should be 6 to 12 mEq per L in the first 24 hours and 18 mEq per L or less in 48 hours. A bolus of 100 to 150 mL of hypertonic 3% saline can be given to correct severe hyponatremia.

What is the most common cause of low potassium?

Low potassium (hypokalemia) has many causes. The most common cause is excessive potassium loss in urine due to prescription medications that increase urination. Also known as water pills or diuretics, these types of medications are often prescribed for people who have high blood pressure or heart disease.

What diseases cause low potassium?

Several syndromes can be associated with low potassium, such as:

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

What causes extremely low potassium?

A low potassium level has many causes but usually results from vomiting, diarrhea, adrenal gland disorders, or use of diuretics. A low potassium level can make muscles feel weak, cramp, twitch, or even become paralyzed, and abnormal heart rhythms may develop.

What medical condition causes low sodium?

Low blood sodium can be caused by:

  • Burns that affect a large area of the body.
  • Diarrhea.
  • Diuretic medicines (water pills), which increase urine output and loss of sodium through the urine.
  • Heart failure.
  • Kidney diseases.
  • Liver cirrhosis.
  • Syndrome of inappropriate antidiuretic hormone secretion (SIADH)
  • Sweating.

Who is most at risk for potassium deficiency?

Potassium deficiencies are more common in people who:

  • Use certain medicines, such as diuretics.
  • Have physically demanding jobs.
  • Athletes exercising in hot climates and sweating excessively.
  • Have health conditions that affect their digestive absorption, such as Crohn's disease.
  • Have an eating disorder.
  • Smoke.

What are the seven signs of low potassium?

What Are Symptoms 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.

What autoimmune disease causes low potassium?

Key Points

  • Hypokalemia may occur in patients with lupus nephritis in the absence of renal tubular acidosis (RTA) or other known causes.
  • Patients with lupus nephritis and idiopathic hypokalemia have a distinct pattern of markers of autoimmunity.

What cancers cause low potassium?

In SCLC, amongst the important causes of low potassium levels in the blood are adrenocorticotrophic hormone (ACTH)-secreting tumors. Ectopic Cushing's syndrome, secondary to lung cancer, is a rare occurrence with a poor prognosis but may manifest with severe hypokalemia, alongside hyperglycemia and muscle weakness.

How serious is low potassium?

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 are the 10 signs of low potassium?

Common signs and symptoms of potassium deficiency include weakness and fatigue, muscle cramps, muscle aches and stiffness, tingles and numbness, heart palpitations, breathing difficulties, digestive symptoms, and changes in blood pressure. If you think you're deficient, contact a healthcare professional.

How do you fix low potassium?

Taking potassium supplements can usually correct the problem. In severe cases, without proper treatment, a severe drop in potassium level can lead to serious heart rhythm problems that can be fatal.

How can I raise my potassium quickly?

In addition to bananas, common foods with high potassium content include potatoes, sweet potatoes, avocados, turkey, dried apricots, leafy greens, dried peas and beans. If you plan your meals to regularly include these and other high-potassium foods, you'll be less likely to need a quick potassium boost.

How do you increase sodium and potassium levels?

Many fresh fruits and vegetables are rich in potassium:

  1. Bananas, oranges, cantaloupe, honeydew, apricots, grapefruit (some dried fruits, such as prunes, raisins, and dates, are also high in potassium)
  2. Cooked spinach.
  3. Cooked broccoli.
  4. Potatoes.
  5. Sweet potatoes.
  6. Mushrooms.
  7. Peas.
  8. Cucumbers.

Can dehydration cause low potassium?

Severe dehydration from prolonged diarrhea and vomiting can be dangerous. You are losing more than moisture as time goes on if you are fighting chronic diarrhea. Along with the fluids you are losing, your body can lose minerals such as potassium.

Which organ is most affected by hyponatremia?

Hyponatremia occurs when your blood sodium level goes below 135 mEq/L. When the sodium level in your blood is too low, extra water goes into your cells and makes them swell. This swelling can be dangerous especially in the brain, since the brain cannot expand past the skull.

What is the fastest way to correct sodium?

Treatment

  1. Intravenous fluids. Your doctor may recommend IV sodium solution to slowly raise the sodium levels in your blood. ...
  2. Medications. You may take medications to manage the signs and symptoms of hyponatremia, such as headaches, nausea and seizures.

What happens when your body is low on sodium?

Low blood sodium is common in older adults, especially those who are hospitalized or living in long-term care facilities. Signs and symptoms of hyponatremia can include altered personality, lethargy and confusion. Severe hyponatremia can cause seizures, coma and even death.

What drink has the most potassium?

The following juices are high in potassium, containing the following amounts per cup:

  • carrot juice (canned): 689 mg.
  • passion fruit juice: 687 mg.
  • pomegranate juice: 533 mg.
  • orange juice (fresh): 496 mg.
  • vegetable juice (canned): 468 mg.
  • tangerine juice (fresh): 440 mg.

What autoimmune disease causes electrolyte imbalance?

SLE is associated with water and electrolyte disorders such as hypokalemia, hyper/hyponatremia, calcium disturbance, and acid–base balance disturbance.