respected sir,i have been suffering headache prob for about 8 yrs,alongwith i have serious indigestion prob,like GERD,severe constipation...so many tests are conducted like ct scan ,mri,thyroid test,but all reports are normal,,but my headache remains same,my ESR always been 30-40.....what may be the cause for headache and what treatment should i take..........help me plz