Hi Doctor, my grandmother who is 82 has on and off pain I believe in the Ischial Tuberosity on the left side, described as "throbbing" and she is unable to go up her stairs. She also has a swollen right foot that was diagnosed as Cellulitis, but has not gotten completely better. She has arthritis and osteoporosis, and has lost weight; she is very thin and it scares me. She works too hard around the house and I am going to try and help her by stretching her hamstrings and periformis and test her strength. I know her hip muscles are weak. (I am a PT Assistant grad)What do you think is going on?