Still none the wiser after 7 yrs post op

After looking around this site, one would assume that having the decompression surgery eliminates the headaches, numbness and other pain for the majority of you. Is this correct?? In my case, I was told the numbness will never go, but wont get worse and the headaches are here for good as well. Actually, can someone tell me why it hurts so much to cough, laugh, sneeze etc......