really osteoarthritis is very painful problem..first she needs a supportive therapy as anti inflammatory drugs in long run leads to peptic ulcers.give her cold and hot alternative hydrotherapy for 10 times in morning and evening,then knee massages with herbal warm oil will help her to reduce her pain and knee join excercises ..along with physiotherapy will heal the problem and try to be relaxed as stress will increase the stiffness in joints so practice meditation,deeper relaxations to release the endorphins from the body to relax the stiffend tendons ,muscles in the joins .keep her busy always with her freind encourage walking daily., along with good sleep. Give her aloevera juice every days 2spoons daily morning and evening.ayur medicne narayana guggulu 2 tabs twice daily will really gives good reslt and you can try for acupuncturetreatment.regards dr.bharathi Ms.