During the first year of recovery my hyperacusis did cause painful headaches. I remember at one of my daughter's hockey game a parent sitting 10' away suddenly screamed, resulting in me bending over and holding my head... I told my wife it felt like a bomb went off in my head.

At this point in time, much of the pain linked to sound has gone. Similar to Mark, too much sound leads to mental overwhelming. This has been really problematic for me lately but there isn't much that can be done... limit exposure and reduce it once I'm overstimulated.