Infections causes it to swell
yes i am deathly allergic to them. i swell so big.
Short answer: no. If your turtle's skin is swollen and bulging out of the shell, it is probably due to the fact that the turtle is not spending enough time out of water. A turtle does not live solely in water. Forcing it to constantly live in an aquatic environment causes the body to fill with moisture, causing it to swell. Give it sunlight and time to roam outside every day.
maybe a cyst
Tonsillitis
When a turtle starts to swell up, there could be many issues that need to be attended to. For example, the turtle could have an abscess. It could have shell rot or internal parasites.
asthma
It softens and causes the hair to swell
No
MUMPS
No.
water on the knee, torn cartilage, arthritis, these are just a few of the causes.