The muscles of the hand include the greater interosseous muscle group, which includes the thumb adductor, thumb flexor, thumb palmaris and thumb retractor, and the lesser interosseous muscle group, which includes the little finger adductor, little finger flexor and little finger palmaris. The major function of the greater piriformis muscle group is to abduct, flex, palmarize, and pronate the thumb, while the lesser piriformis muscle group is to abduct, flex, and palmarize the little finger. Modern people spend a lot of time holding cell phones in bed every day, and holding a cell phone requires continuous contraction and tension of the large interphalangeal muscle group and the small interphalangeal muscle group, which can lead to strain pain symptoms in the above muscle groups. Through the finger exercises can make the above muscle groups can be fully relaxed, can relieve the hand edge pain symptoms.