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The average head weighs 10 to 12 lbs, and the neck and shoulder muscles work very hard to hold the head up. This repetitive use of the muscles along with daily work, physical stress, improper sleeping habits, poor posture, previous neck injuries and emotional stress can all cause neck muscles to tighten with time. The tight muscles cause pain and restriction in movement.
With aging, the spinal discs can become weak and will bulge with pressure from the weight of the head and from tight neck muscles squeezing the vertebrae and disc together.
Tight neck muscles and bulging disc(s) can exert pressure on nerves and blood vessels to constrict circulation between the head, neck and arms. This can cause headaches, weakness, pain, numbness and cold sensation anywhere in the arm.
Neck traction can stretch and relax the neck and shoulder muscles while improving the spinal posture. The stretching can decompress the spinal disc which may minimize bulging and ease the constriction on nerve and blood circulation. Neck traction can also take pressure off the painful and stiff joints to relieve pain and improve mobility