What can cause my neck and shoulder muscles to stay stuff and hard and knotted up all the time ? i feel as if i been in a car accident. painful.

Ergonomics?: Well, there could be numerous causes, from recent or remote trauma, stress, & so forth. A common overuse neck injury problem is pain and spasm from working for long periods at a computer where the screen is too low forcing prolonged neck flexion. Meanwhile, local heat & massage therapy can help. Do see a clinician if you have numbness or pain radiating to shoulders or arm/hand. Hope that helps.

Stress: Either physical or mental/Psychological. Try Relaxation Technique, Massage therapy and Application of Ice and/Or Moist heat. Deep Breathing and Support to your neck muscle at night time may help.

Several ideas: Stiffness and muscle spasm in your neck and shoulder girdle can be due to various causes such as: stress causing you to tense up your neck/shoulder muscles; unhealthy position of neck/head when sleeping; carrying heavy back pack or shoulder bag and occasionally a pinched nerve in the neck can cause pain and stiffness. SEE: Stress: http://bit.ly/1v0GgZh http://bit.ly/1z3E1qf http:/bit.ly/1H2HidU