Girls- do you ever see spots when shaving underarms?

Often, when shaving my underarms, something strange happens and I hate it. The way I shave is I lift up my arm (sometimes resting it on my head) and use the other hand to shave under it. But what often happens is I'll start seeing spots! like a white glitter hallucination. It makes me feel dizzy and slightly faint. Do I have some kind of exposed nerve or something? is this normal? I think this has happened other times when not shaving if my arm was raised, or something pressed under my arm.
Girls- do you ever see spots when shaving underarms?
Post Opinion