Hello,
I want to know something about you like have you ever met with an accident or fell down? Actually Low back pain and numbness of hand are different but the causes may be related to each other. You have left hand numbness it has many causes like nerve compression of neck arm or wrist, fracture,
cervical spine stenosis,
peripheral neuropathy, Diabetes, multiple sclerosis, stroke, minerals and
vitamin deficiency, under active thyroid glandetc.
Although back pain has also many causes like
back muscle injury or strain or ligament sprain, PIVD, degenrating disc,
osteoarthritis,
spinal stenosis, fracture etc. For the back pain you can take ice/heat therapy for 20 mins after every 2 hrs. Take some medicines for pain like ibuprofen, naproxen etc. Take physiotherapy. Take
massage therapy. Do some isometric back exercises. Avoid forward bending, weight lifting. For the numbness of your left hand we must know the exact cause behind it even then You can take Cap Methylcobalamine 1500 mcg HS.
If you don't get the relief then consult the neuro or ortho, get some test like blood test, X ray and MRI to rule out the exact cause.
Hope I have answered your query. Let me know if I can assist you further.
Regards,
Dr. Ankur