What does it mean when your fingers lock up?

Hand cramps: Could be calcium deficiency?

Trigger finger: Individual fingers can get locked in the flexed position when the flexor tendon gets caught at the a1 pulley in the palm of the hand just below the knuckle joint. Sometimes you can feel a knot right there. Treatment is rest and potential steroid injection if conservative therapy does not work.

Trigger finger: Generally, locking of the fingers or thumbs are caused by trigger fingers. This is a benign condition in which the tendon becomes entrapped around a structure called the A1 pulley. If this is painful, an injection or surgery can improve the symptoms. If this is not painful, you can live with this as long as you have full range of motion and full function.