Studies have shown that forward head posture affects your nervous system and autonomic functions.
Cervical instability can cause a decrease in neurological functions of the lower part of the brain stem affecting the Vagus, glossopharyngeal and accessory nerve.
Over time, forward head position can lead to muscle imbalances as the body tries to adapt and find efficient ways to hold the head up for straight-ahead vision.
Changes to the position of C1 and C2 can cause decreased blood flow to the brain via the vertebral artery and a symptom of this may be a headache.
As the body compensates, muscular structures become overworked which, can result in compression on the nerves causing referred pain and neuropathy.