Spots on silver coin

Hi guys, I have this silver coin for a month and last week I noticed a circular bright spot on the coins' surface with a dark tiny dot in the middle. I am sure this wasn't on the coin before. Please help me identify this type of spot and what should I do with it, I'm afraid that this will spread throughout the coins surface.

Thanks for everyone helping.

Just to make sure the spot is not on the capsule, and to get more accurate images - remove it from the capsule and retake the images please.

It's a milk spot (most often silver chloride), from improperly cleaned planchets. 

https://www.bullionbypost.eu/index/silver/milk-spots-silver-coins/

It will not spread but more can appear in the future (or not), their appearance is destined the moment the cleaned planchets were annealed.

I don't know what it is but I don't think it's a milk spot. It's too round and too big and that dark spot in the middle isn't typical either for a milk spot.

I have seen them round with an epicenter like on OPs coin on a couple of my own bullion and I have a few that look more like on the example picture of the linked website. Very similar shade maybe different stage of contamination in the process but definitive silver salt crystallisation sites that slowly appear long after you've bought your coin even in mint en-capsuled bullion 🥲.

Hi guys thanks for responding! This is a close photograph I took with my digital camera. The circle does look like a milk spot to me but I don't know what is the kind of chemical reaction in the middle. Should I try to get rid of these spots and if yes how? “Luckily” this is on a very rough surface of the coin.

There are techniques to remove milk spots. I have a coin that looked like this

It now looks like this

I wouldn't recommend it on a proof coin.

ronyefet123

Should I try to get rid of these spots and if yes how?

I don't know what that thing in the middle is, but as far as I know nothing can be done on milk spots, so better not to try anything to avoid bigger damage.