A pencil grip is considered dysfunctional if it blocks the movement of the fingers, causes discomfort, causes fatigue, and leads to untidy work.
In order to control it, the child stars controlling the pencil with wrist or arm movement which becomes tiring and less effective.
Such children complain of pain in hand and arm and maybe found excessively rubbing or shaking the hand or arm. The child fails to complete the task because of tired hands which leads to untidy work. Using a pencil grip could assist but must not be used in isolation. Developing the child’s fine motor co-ordination and strengthening of the hand muscles is also important.