Swollen snoods occur during the game called "Snood pulling contests". It is a common disorder caused by excessive snood pulling contests. When I saw the first one I was in shock a turkey of mine could do that. I soon come to realize all turkeys do it. Sometimes they pull the other turkey's snood for 5 minutes or more.
I think your turkey is playing you for more indoor loving time. They are devious and will do that stuff.
Lol mine had a swollen snood once. His brothers gang beat him and were falapping at him, kicking him, pecking his face and of course pulling on his snood... It wasnt pretty. I tried to stop them but I got "winged" in the face a time or two. I butchered them that day.... They were going to be bitcher a week later anyways so I did it sooner....