There are several possible reasons and the only person who can tell you for sure is a vet. The ferret should be taken to the vet as soon as possible. To confirm either of the below causes the vet will need to run tests.
Two common causes
1. If the ferret was spayed at a young age she could have a partial spay. This is rare but happens when the ferret is spayed before she is fully grown.
2. If she is also starting to lose fur (beginning at her tail and spreading) it could be adrenal disease. Adrenal disease is curable as long as it is caught early.
A bacterial or fungal infection.
I say this all the time, if it was your vulva swollen and bleeding, what would you do?
nothing
Gummy bears have a gelatin base. Any liquid would cause them to swell, not just Sierra Mist.
stress
A wedding ring might swell if it were injured. Arthritis or an infection might also cause swelling.
The vulva generally does, which is the external female genitalia for the bitch. You would not be able to tell if the vagina is also swollen without an internal exam of the female.
it cause it to swell
taking to much from the vibrator, and or taking it from a guy to hard
Pancreatitis, inflammation of the pancreas, would cause a pancreas to swell or increase in size.
'Cause if they didn't lay them, they would swell up and burst!
Malnutrition would affect your whole body, not just your feet.
no why would it swell. get it checked out.