If I were to write a book about them, it would be longer than the Harry Potter series.
But the most frequent ones are related to physical issues. I spend so much time inside my head that I become completely unaware of my surroundings.
I often can be oblivious of the weather, to the point that I realize I should be wearing a coat in the moment I get to a meeting place, and my friends start giving me weird looks.
Being unaware of physical needs, especially food and sleep, for a long time. I pay no mind to "physical signals", until I have a headache so strong that it leaves me numb, or I when I feel like fainting.