Help crop is like a air bubble

[Domino-The-Rooster]

Help crop possible tumor she is a 4 week old buff laced polish while I was giving her a bath I tociced a lump by her wing and crop the right side is all full but the left isn't the lump is like a air bubble and has veins I'm worried please help

 

[Domino-The-Rooster]

please help