Stuck in my Skull

Imagine a single thought
That spreads inside your mind
And splits into a million
Separate angled kind

A legion of ideas
Stuck inside your head
That all focus on one thing
With force as big as lead

Sometimes I fear I'll die
From how I over think
Like pins and needles piercing
My brain at different links

You think it would be easy
To give up thoughts that pull
Yet, for some reason they
Remain stuck in my skull