There are 3 main reasons for the neck to turn left and right with a zipping sound: 1. Gas escape. In our body between the joints, there is a liquid called synovial fluid, is used to lubricate the joints, this synovial fluid contains some gases, such as oxygen, nitrogen, carbon dioxide. These gases form bubbles in the synovial fluid, and when we stretch the joints, the gas in the synovial fluid runs away sharply, causing a zipping sound because the bubbles break. 2, joint displacement. When we move the joint, the tendon ligament shifts, and when the tendon ligament returns to its original position, sometimes a nuisance sound is heard. 3. Arthritis causes rough joint contact surfaces. Arthritis can damage the cartilage tissue between the joints, causing the joint contact surface is no longer smooth, in this case, the joint friction will produce a sound.