If the pain
started suddenly and is radiating from the back
to the back of the thigh
, it is most likely a herniated disc.
You need to visit
an orthopaedician who will examine your dad and see if the disc is pressing on any nerve
. In such a case there will be tingling
and possibly weakness in the feet. X rays and MRI
may be needed if your examining doctor feels necessary based on the findings.
For the meanwhile, your dad has to take rest. Lay down on a soft flat bed with a pillow under the knees. If he has to get up from bed, he should turn to the side, hang his legs and then get up supported.
If he is taking any pain reliever, he can continue.
Strictly avoid any bending or lifting objects from the floor.
He should also avoid any stretching or massages. Physiotherapy
will be guided
once your doctor examines.