Leg cramps at night, also known as nocturnal leg cramps, are sudden, painful muscle contractions that occur during sleep. The exact cause of leg cramps at night is unknown, but there are several factors that may increase the likelihood of experiencing them:

• Tired muscles
• Nerve problems
• Dehydration
• Electrolyte imbalances
• Medications such as diuretics, steroids, and antidepressants
• Pregnancy
• Excessive strain placed on leg muscles
• Abnormal nerve activity during sleep

Most of the time, there is no known cause for night leg cramps. However, kidney failure, diabetic nerve damage, and problems with blood flow are known to cause night leg cramps. If you are experiencing frequent leg cramping, you should reach out to your doctor. You may be able to reduce the likelihood of experiencing leg cramps through stretching, staying hydrated, and adjusting your medications.