HELP MY DUCK KEEPS GETTING BUBBLE ON HIS FOOT

[Dannythegoseshmichal]

Can someone pls help me my duck keeps getting these bubbles on his foot they are squishy and feel like there filled with air or liquid I don't know how to get rid of them and j don't think it's a wound it doesn't seems to bother him but it looks like he is kinda annoyed someone please help! I don't know how to put images pls tell me so I can show u!

 

[Dannythegoseshmichal]

Here are the images!

 

[Isaac 0]

Is there only one of these "bubbles" on the duckling's foot, or are there several?
If it beginning to become uncomfortable for the duckling, I think I would disinfect the top portion of the webbing, and either make a small incision with a scalpel, or poke a small hole with a needle, and try to press the fluids out. How I would proceed afterward would depend on what I see come out, so if you want to try that, and report back here fill free to do so - it could be anything from a hematoma due to blunt injury, blistering due to burns, or even an abscess.