Neck pain, also known as cervicalgia, is a common problem, with two-thirds of the population having neck pain at some point in their lives.Neck pain, although felt in the neck, can be caused by numerous other spinal problems. Neck pain may arise due to muscular tightness in both the neck and upper back, or pinching of the nerves emanating from the cervical vertebrae. Joint disruption in the neck creates pain, as does joint disruption in the upper back. The head is supported by the lower neck and upper back, and it is these areas that commonly cause neck pain. The top three joints in the neck allow for most movement of the neck and head. The lower joints in the neck and those of the upper back create a supportive structure for the head to sit on. If this support system is affected adversely, then the muscles in the area will tighten, leading to neck pain. Neck pain affects about 5% of the global population as of 2010.
Low-level laser therapy has been shown to reduce pain immediately after treatment in acute neck pain and up to 22 weeks after completion of treatment in patients that experience chronic neck pain. Low quality evidence suggests that cognitive-behavioural therapy may be effective at reducing pain in the short-term. Massaging the area may provide immediate and short-lived benefits, but long term effects are unknown. There is a lack of high-quality evidence to support the use of mechanical traction, and side effects include headaches, nausea and injury to tissue. Radiofrequency denervation may provide temporary relief for specific affected areas in the neck. Transcutaneous electrical nerve stimulation (TENS), the noninvasive use of electrical stimulation on the skin, is of unclear benefit in chronic neck pain. Epidemiology
Neck pain affects about 330 million people globally as of 2010 (4.9% of the population). It is more common in women (5.7%) than men (3.9%). It is less common than low back pain. Prognosis
About one-half of episodes resolve within one year and around 10% become chronic. Prevention
Prevalence of neck pain in the population suggests it is a common condition. For cervicalgia associated with bad posture the treatment is usually corrective in nature (i.e. ensure shoulders are in one line above the hips) and relating to interventions that provide ergonomic improvement. There is also growing research in how neck pain caused by mobile devices (see iHunch) can be prevented using embedded warning systems. References
External links

6 Ways to Ease Neck Pain - Harvard Medical School
Neck pain - Symptoms and causes - Mayo Clinic