Help diagnose Sick yellow tang with pic

[johnnyblaze313]

She has been with me for a little more than 5 years without any illness, last week I noticed some swelling on what I guess would be called the snout? Between the eye and mouth (just on one side) I seen the cleaner shrimp picking at it that night and the next day the swelling was gone.

Today the same spot is very swelled and there's what looks to be a wound there. I noticed her scratching it on the rocks and sand today also so I'm thinking that could be where the wound come from? Heres the best pic I can get the wound is right below the eye and the swelling starts there and ends at the mouth, thanks for any help.

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[Amazon4]

Who does she have for tanks mates? Anything in the tank that can sting her (e.g. rabbitfish)? any nems? Any recent additions?

She looks nice and plump - she still eating?

 

[MatthewLaw]

beautiful fish (minus the area you mentioned)

that scratching manuever is classic ich symptoms...

 

[johnnyblaze313]

I dont have any anemones but I was thinking it could be a sting because of the swelling, maybe?

She eats plenty all day no change there. The wound has lost it's redness and is just white now.