Naturalist definition, a person who studies or is an expert in natural history, especially a zoologist or botanist. See more.
Nighttime leg cramps are a sudden intense pain in the thigh or calf. A cramp is a tight muscle that won't relax. They can be caused by mineral deficiency.
Common night leg cramps should be distinguished from a condition that causes leg cramps while walking. This is called intermittent claudication and is due to arterial disease with partial or complete blocking of the arteries of the legs.