Does my nickel have multiple errors? 0

[Chris2399]

So I'm new to coin collecting, but I found this coin and I don't know if it's normal wear and tear, or if they are errors:

The one thing I notice is that the collar of the shirt looks like just a spec/non-existant

The other thing I notice is the hair does not go all the way down and is practically invisible. Parts of the coin that are higher (more susceptible to wear) are not worn down like this. 

On the back, I notice that the letters are right up against the edge of the coin.

 

[DWLange]

It is just damaged from a coin counting or rolling machine (the circle on reverse) and general circulation wear and contact.