Receding gums is a condition in which the gums retract from the surface of the teeth to reveal part of the roots of the teeth, and this receding may be normal or indicate a health problem that needs treatment to avoid aggravating the situation.
And it has several causes, including: gum disease, genetic factors, violent tooth brushing, smoking and others.
When receding appears, you should see a periodontist to solve or control the problem.