alright so the craziest thing happened today, a male budgie flew into my kitchen and i caught him and put him in the cage with my other male budgie (named Bluetooth) and they seem to get along just fine, but the thing is the new bird has some sort of what looks to me like an infected wound. his toe looks swollen and covers the claw and looks infected like he was injured in a fight or something. i really don't know what to do to treat him please help me
here's how it looks like