Welcome to HealthcareMagic.
I guess your mother has taken anti tubercular medicines regularly.TB spine in longstanding cases can cause damage to the body of spine and can compress the nerves coming out of it.Your mother must be having the same causing pain.Does she have numbness
of the limbs
too? I advise you to take an MRI
and see the condition of spinal bones and get treatment plan accordingly from an Orthopedician.
I wish your mother a speedy recovery.