In all probability, your mom has the most common orthopedic problem in the world - osteoarthritis
. That is if she has not injured herself. then she might have a menisceal injury
or just a sprain
I would personally not suggest u take the trouble of travelling all the way to Gurgaon / Delhi - it is most likely a petty problem. Consult an orthopedician or a general physician in your town or in Bhopal, whichever is nearer. And remember, all problems cannot be sorted out in a day - please be patient. And please give details, such as how long she is suffering, injury, is there pain when she sleeps, etc.