I am 45 years old with controlled type 2 diabetes ,  pco, pain in  left top side of my  back. I have been having  severe headaches. My  esr  increased from  35 t0 55 even when i had taken 250 mg proximexa  as advised by my doctor since he suspected infection. why did my esr increase after 3 days of antibiotics?
ESR is a nonspecific test indicating the presence of an inflammatory condition. This could be due to an infection or to many other causes. The inflammatory process and the change in ESR could be due to the infection and would occur regardless of antibiotic treatment- it is part of the bodies response to the infection. If the infection clears up with treatment, the inflammatory process will start to clear up, but signs of it such as the ESR may take some time to return to normal. The ESR is not useful for take the courses of an infection. Again, it may also be due to an entirely different condition from the infection, such as arthritis, lupus, response to injuries, etc. etc. Hope this helps.