im 66 yrs old male.my hb is 14, N 67,L 30 and ESR is 40, RA factor is +ve, blood sugar is 68,blood urea is 26, uric acid 4.2, blood chlorestrol is 127. i do have tennis elbow and i have taken steroids recently. i have mild pain occasionally in joints. my weight is 83 kg and height is 175 cm.i do brisk walk for 30 min five days a week. what is the cause and effecr of high esr,is it a major worry and how do i change my RA factor to negative?