One of the weird things I found after returning to work after a long period of illness (cancer) was a notebook where I had scrawled all over one page, "Why do I

One of the weird things I found after returning to work after a long period of illness (cancer) was a notebook where I had scrawled all over one page, "Why do I have headaches all the time?". I had completely forgotten about that until I found the notebook, and in retrospect one of the (many) warning signs I had missed.