HI HCM thank you, First thing you need to do is to rule out the cause of pain, as you said that you are in sitting position most of the time, so postural pain could be a cause, I think the cause should be treated first, and not to take the pain killing tab, without any proper reason, it is totally harmful, just change your life style, have medically examine your self, to rule out certain common medical condition like Diabetes, Hypertension, collagen disease, Thyroid dysfunction, Have nice day.