11 Warning Signs You May Be Low in Potassium: Know the Symptoms of Hypokalemia

Potassium plays an important role in muscle function, nerve signaling, and maintaining a normal heart rhythm. When potassium levels become too low—a condition known as hypokalemia—symptoms can develop, particularly when the deficiency is significant.

Possible warning signs include:

• Muscle weakness or unusual fatigue
• Muscle cramps or spasms
• Constipation
• Tingling or numbness
• Heart palpitations or an irregular heartbeat
• In more severe cases, significant weakness or paralysis

Severe hypokalemia can be dangerous and may require prompt medical treatment. Symptoms alone cannot confirm low potassium, so a blood test is typically needed for diagnosis.

If you experience fainting, chest symptoms, severe weakness, or a racing or irregular heartbeat, seek urgent medical attention rather than attempting to correct your potassium level on your own.