do not afraid ,we need detail history about your mom problem like swelling bowel movement etc , and some investigation like RA FACTOR, SR.
CREATININE,,
URIC ACID,BLOOD SUGER ETC if u can report this to me it will easy to diagnose .till than u can give massage with mahanarayan oil and tab rasnadi guggulu 2 tab three time in a day and avipattikar ch +yastimadhu ch+sariva ch all mix together take one tsf three time in a day tab shelcal one in day after food.sure she will get relief .and give feed back here only