Having severe osteoporosis
at this age age requires evaluation.
There can be 2 reasons having this problem.
1, deficiency of calcium, Vitamin A
2, intake of low calcium or low absorption of calcium.
3, parathyroid hormone
( parathormone ) depletion in blood.
Go for S. calcium level, parathormone estimation, parathyroid gland
After all these reports your orthopedic surgeon will go for treatment accordingly
Ok and take care.