they're little bits of muscle that release an adhesive molecule so that the bits of muscle stick together and form "knots". usually from bad posture/overuse/that kind of thing. the muscle i think you're talking about is the upper trapezius. it's nothing to worry about, but massages are great for it, albeit a little painful at the time.
No, you can get welts in your head. Knots usually are in the shoulder or back
Knots in the back of the arm can be caused by a number of conditions such as inflammation or infection. To get rid of these, swing the arms back and forth, as well as do some shoulder circles.
deltoids are the back shoulder muscles and trapezoids are the muscles around the shoulder/neck/back area
A 12 year old could have neck shoulder and back pain. He/she could have scoliosis or something else.
There are several simple neck stretches to relieve neck pain and stress. These exercises include neck stretch, shoulder shrugs, and upper back stretch.
the neck is cephalad to the shoulder
deltoids are the back shoulder muscles and trapezoids are the muscles around the shoulder/neck/back area
The trapezius is an upper back/neck muscle and the deltoids are shoulder muscles
Trapezius Muscle!
the neck is cephalad to the shoulder
It can be. Heavy breasts can contribute to back, neck and shoulder ache.
The wrist and the shoulder can be considered attachment areas of the arm. The arm is attached to - the neck at the shoulder - the torso (chest, back) at the sides of the shoulder and the armpit - the hand at the wrist