Feeling the back of my head for 500 days in a row to see if I feel anything different.

I’ve been feeling the back of my head for 341 days in a row. I haven’t really felt anything different yet. I think I’m touching the same part of the back of my head every day and I always use my right hand or both hands (pictured).

There’s a little bump right in the center of the back of my head and if I press it hard enough it really hurts. That’s all I’ve found out so far.