Not sure what you mean here - do you mean forward head posture? Many of us fight slouching posture due to tight neck muscles. Can you describe the area?
An example of more progressive problems - kyphosis:
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http://www.healthcentral.com/osteoporosis/osteoporosis-related-disorders-11985-41.htmlInfo:
http://www.spondylitis.org/about/complications.aspxThe fusion of the spine can sometimes lead to a forward curvature of the spine, kyphosis, causing a forward-stooped posture. Although this can happen in the most severe cases of AS, it is now far less common given the advances in treatment.
It is important to follow your doctor's instructions and to take your medicine on schedule so that you can maintain a daily exercise schedule which over time, will make you feel better. It is also important to pay particular attention to your posture in order to avoid kyphosis. With the advent of the newer classes of medications, specifically the biologics (anti-tumor necrosis factor alpha agents) there is reason to believe that the natural course of spondylitis may be slowed or halted. More studies are needed to confirm this.