SYMPTOM
Sudden, painful tightening of your leg muscles, most often in the calf, that strikes while you're asleep. This can be caused by dehydration, muscle fatigue, standing for too long, mineral imbalances, or sometimes even certain medications.
For general awareness only. This is not medical advice. If symptoms are severe or persistent, consult a healthcare professional.
Showing 9 causes
Overexertion and muscle fatigue
Straining your leg muscles too much during the day could leave them fatigued and prone to involuntary contractions during rest. This makes them more likely to cramp up when you're trying to sleep.
Dehydration
Not drinking enough fluids could lead to electrolyte imbalances in your body. This upset balance could disrupt normal muscle function, causing them to seize up painfully.
Nerve compression
Pressure on nerves in your spine or legs, like from a herniated disk, could cause irritation and pain signals to your muscles. This nerve irritation could lead to cramping.
Pregnancy
Pregnancy could cause changes in circulation and pressure on nerves, along with potential mineral deficiencies. These factors could contribute to increased leg cramping.
Poor circulation in legs
Narrowed arteries reduce blood flow to your legs, meaning muscles don't get enough oxygen when they need it. This could cause pain and cramping, especially with activity or at night.
Low magnesium (hypomagnesemia)
Magnesium helps your muscles relax after contracting. If levels are low, your muscles may not be able to fully relax, which leads to cramps.
Low potassium (hypokalemia)
Having too little potassium in your blood affects nerve and muscle signals. This could make your leg muscles more excitable and prone to sudden, painful spasms.
Certain medications
Some drugs, like statins for cholesterol or diuretics for blood pressure, could interfere with muscle function or electrolyte balance. This side effect could trigger leg cramps.
Peripheral artery disease
This condition narrows blood vessels supplying your limbs, reducing blood flow and oxygen to leg muscles. Insufficient oxygen could cause cramping pain, especially during rest.