Legs cramp are a common issue that tortures many people during sleep, and they are unexpected and fast muscle spasms or contractions, felts in the thighs, feet, and calves.
They usually occur after the person falls asleep, or just before opening the eyes in the morning. Yet, the pain they cause can be pretty intense and might last for up to a few minutes.
When it goes away, the muscles remain tensed and tight and are sensitive to touch and sudden movements.
Yet, leg cramps and restless leg syndrome are not the same. Namely, people experience greater pain when they move their legs during the cramping, while in the case of the restless leg syndrome, makes people feel relaxed when they move the legs.
The reason for leg cramps is still unknown, but some scientists argue that certain health conditions and activities might cause this painful experience.