If you experience cramps in your legs at night, you are likely dealing with nocturnal leg cramps, often called charley horses. These are sudden, involuntary, and often very painful muscle contractions that usually affect the calf, but can also occur in the feet or thighs. They tend to happen while you are resting, frequently waking you from sleep, and may last from a few seconds up to 10 minutes. Although the pain can feel intense, these cramps are usually harmless and resolve on their own.

Many people have been jolted awake by a sharp, tightening sensation in the leg. The pain can feel like a deep knot in the muscle, forcing you to sit up, stretch, or massage the area for relief. Even after the cramp subsides, the muscle may remain sore or stiff for hours or even days. Despite how alarming they can feel in the moment, they are not typically a sign of a serious condition in otherwise healthy individuals.

Nocturnal leg cramps are quite common across different age groups. Studies suggest that up to 60 percent of adults experience them at some point, with the likelihood increasing after the age of 50. Older adults, in particular, may have them more frequently, sometimes several nights a week, which can disrupt sleep and reduce overall well-being.

Younger people are not completely spared either. Research shows that up to 40 percent of children and teenagers may occasionally experience these nighttime cramps. For many, they occur only rarely, often after intense physical activity or long periods of standing.

For others, however, leg cramps can become a regular nighttime issue. Frequent episodes may lead to poor sleep, anxiety about going to bed, and daytime fatigue. Managing triggers such as dehydration, muscle overuse, or poor circulation can often help reduce how often these cramps occur.