I had microvascular decompression surgery through a craniotomy of the VIII cranial nerve eight weeks ago. It was decompressed at the brainstem and in the internal auditory meatus. I still have loud noise, but it has come down in pitch. I also still have the pulsing. Could it be that there is still swelling and inflammation in that small space that is squeezing things together? The neurosurgeon s feel that the surgery was a success, but I thought I would be better by now.