Arm massage techniques. Through every day living, computer use, carrying heavy bags, driving people often experience pain and discomfort in their arms. That pain and discomfort can be both in the flexors on the inside of the arm and the extensors on the outside of the arm. I always try and keep my thumbs together and stand behind my thumbs so that all my weight is sinking in to the body without injuring myself. This technique is called milking and you can also shake at the elbow, tapotement and petrissage and kneading. Gentle stretches, you want to make sure to massage the entire arm including the shoulder as many of the arm muscles cross the shoulder joint.