1, there is a cocoon at the junction of thumb and forefinger, which is formed by holding a gun for a long time.

There are cocoons on the left and right sides of the index finger, which is caused by long-term practice of pulling the trigger.

3. There is cocoon on the right shoulder, which is caused by the shooting positions of pike. For lefties, on the contrary, there should be a cocoon on the left shoulder.