I have a bird with similar swelling in the wattles and face. I am so glad that I found this thread!
I looked at the link that Diana gave, and that is what my chicken looked like. Also like Louie. I had assumed frostbite because of our insanely cold snap. This happened Friday evening, and I brought her in the house as soon as I noticed it. But she was not getting better. She was getting worse. I gave her Sulfa drugs in her water yesterday, but unfortunately, she wasn't drinking. So I soaked her kibbles in the medicine water and tempted her to nibble at the mash off my fingertips several times throughout the day.
She is much improved this morning! Thank you Diana! As always, your advice is good.
And thank you to everyone else for trying to help. BYC is such a wonderful community filled with really great people.
When I searched "swollen wattles" I found a lot of threads with that title. I hope that Louie, and all of the other birds that are suffering from this, makes a complete recovery. I know that we were at the point where we had to consider culling, but now we are hopeful.