a THR was made for me 4 yrs ago, since then CRP ranged from 6.5 to 10, the last was 6.5 , and ESR from 15 to 22 , no drain ,no swelling just tolerable pain sometimes.. there is one clearly visible(and smaller not visible) enlarged lymph nodes in my neck , are they the cause of such crp and esr? is my THR infected?I am 64 yrs, 86kgm . Thank you