i am suffering pain in my left side butt going...

pain in the buttock going down to the leg means the presence of sciatica 

what is the treatment of sciatica

to treat the pain you can use drugs like ibuprofen and muscle relaxant like orphenadrine  and physical theraby may be used and in cases that do not respond to these treatments then cortisone injection can be used under physician supervision and if there is muscle weakness or sever pain then surgical intervention can be done to decompress the nerve

How sciatica diagnosed

you should follow up with orthopedic doctor and x ray can be done to exclude nerve compression and MRI and CT of the spine should be done to exclude disk prolapse

what is the causes of sciatica

compression of sciatic nerve by bone spur
diabetes
nerve compression bu tumor
prolonged sitting
obesity

what is the symptoms of sciatica

pain in lower back and buttock and leg
numbness or tingling in the leg
pain can become worse with cough
muscle weakness in the leg