Postural Headaches The next time you get a headache, check your posture. Poor posture causes muscle strain, changes in your breathing patterns and leads to a host of problems, including headaches. Without being conscious and taking positive steps to get your posture back in line chronic neck pain and headaches will occur. Neck-related headaches are nerve related which can be caused by stress which can consequently lead to straining or inflammation of the discs and facet join