SOS

[Stinkerbella]

Just had 5 chicks hatch chicks in past all done very well but this hatching I have one chick that seems to have fluid build up under its chin and back of its neck - seems normal and lively very talkative but if you hold it up to the light you can see it's swollen and seems like fluid build up - I don't think it's hatch mates hurt him but wasn't there 24/7 either - anyone ever have this? None of other chicks are like that also can't get pic too fuzzy to see

 

[coach723]

It may be air rather than fluid, which could mean a ruptured air sac. I'm attaching a couple of links, you can search and find more. The BYC thread link has a post on how to release the air if that is what is going on. Anytime you have an injury, pictures are worth a 1000 words, and helpful.
https://www.beautyofbirds.com/firstaid.html
https://www.backyardchickens.com/threads/is-this-a-ruptured-air-sac.889866/