About a week ago, I discovered I had an abscess on my back and it was drained at my doctor's office. Once the abscess began healing, the throbbing pains I've had on the top left front side and back right corner of my head are gone. I'm convinced I had the abscess since 2014, as I was in a wheelchair for a month while I was in rehab. I still have pain issues with my shunt interacting with everything in the area: weather, magnetic fields.
The throbbing pains in my scalp had been there since my brain injuries in 2014. I was told the abscess had developed over months and could take months to fully recover.