(Concern) I get cramps in my legs very often.

Do you usually get cramps often?

Lately, I often wake up because of cramps in my legs while sleeping, and I'm worried about it.

There have been times when I woke up about three times in one night when I was very sick, but I don't do intense exercise, and I usually don't have leg cramps, yet I suddenly wake up making a loud sound like "ah" several times.

Is this just due to lack of exercise?

In the morning, when I wake up and try to stretch my legs or do a stretch, the calf muscle becomes stiff immediately, and I experience intense pain.

My legs become really stiff like stones in an instant and it hurts so much that I hit them with my fist, and I have to hit them hard to gradually loosen up.

In that brief moment, I really wanted to scream, but it's not just once or twice, not just a day or two—why am I like this?