Today I was putting my hair up in a ponytail and felt a bald spot on the back of my head. I asked my dd and dh to have a look and I do indeed have a bit about the size of a 10p that is bald. It's not painful at all but I have noticed a lot of hair falling out recently.
This has happened before a few years ago where I had a really large bald spot at the back and another one on top of my head. I put this down to stress at the time.
I have been diagnosed with fibromyalgia and not sure if this is a known symptom of this or it's a symptom of something else.