Hi there. Your Mother is experiencing symptoms of sciatica and this is because of disc slip causing nerve pinching. I would recommend that she try back stretching exercises. Avoid forward bending, lifting weights. She can wear back support like Lumbar belt. Also medication like pain killer and muscle relaxant combination like Tablet Diclofenac + Thiocolchicoside would be very helpful. Also for the tingling and numbness, she can take Tab;et Pregabalain + Methycobalamin. Get tested for Diabetes. With proper physiotherapy surgery can be delayed if she responds . God bless.