(Thanks Praveen)
Long term repetitive action stress can lead to Carpal Tunnel.
You could end up going under a surgery that looks like this:
Exercises 1 and 2 flex and extend the hand and stretch the wrist. Bend the hand as shown in the photos and apply moderate pressure to it with the other hand.
Exercise 1 - Wrist Flexion Bend the hand being exercised backward (palm away from you ), as shown in the photos. With the fingers of the other hand, apply pressure.
Exercise 2 - Wrist Extension Bend the hand being exercised forward ( palm toward you ), as shown in the photos. With the fingers of the other hand, apply pressure.
Exercises 3 and 4 are similar to 1 and 2 except that an object, such as a pad provides the resistance to the hand, instead of your other hand.
Exercise 3 - Wrist Flexion against surface With your arm held vertically, press your hand, palm down, on a firm surface, as shown in the photo.
Exercise 4 - Wrist Extension against surface With your arm held vertically, press your hand, palm up, on a firm surface, as shown in the photo.
Exercises 5 and 6 involve the side to side range of motion of the hand.
Exercise 5 - (Radial Deviation) Place your hand palm downward. Grasp the fingers of the hand to be exercised with your other hand (as shown in the photo) and twist the hand toward you. Keep the hand horizontal.
Exercise 6 - (Ulnar Deviation) Place your hand palm downward. Grasp the fingers of the hand to be exercised with your other hand (as shown in the photo) and twist the hand away from you. Keep the hand horizontal.