my mother broke a hip 1 month ago she didint want operation so ve did with bed rest and antirotacion plaster cast yesterday we go to control and doctor says that hip is healing and remove the plaster cast he says to rest another3 weeks to rest and walk with canes and then go to fisical rehab but now my mother has pain in the knee in hip has no problem byt knee is very painful when she tries to lift the leg...pls tell me what is the reason of that... greetings from macedonia