Hamster Cheek Pouch Swollen on One Side or Won't Go Down: Causes
It can be alarming to see one of your hamster's cheeks staying puffed up, or the cheek pouch looking turned inside-out. Most of the time it's simply food storage in progress, but it's occasionally a real problem, so it's good to know how to tell them apart.
Normal situations
- One or both cheeks are puffy because food is stored in the pouches — this usually empties within a few hours to a day.
- Cheeks going flat right after food is moved to the nest/house.
Situations that could be a warning sign
- The cheek hasn't emptied for several days: sometimes food hardens or gets stuck inside the pouch and won't come out.
- The cheek pouch turns inside out and comes out (prolapse): if red, moist tissue is visible outside the mouth, that's an emergency.
- Only one side stays swollen and hurts when touched: an abscess or tumor can't be ruled out either.
What to check at home
- Think back on whether anything sticky or sharp (like nut shells) was in the food fed recently.
- Watch whether the cheek stays full for more than a day.
- Check whether they show sharp pain or try to avoid being touched there.
When to see a vet
Cheek pouch prolapse (tissue turned inside-out and protruding) needs an immediate vet visit with no home treatment attempted. Beyond that, if the cheek stays full for more than a day, or there's a clear pain response to touch, it's safer to have an exotic vet check it out.
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Frequently Asked Questions
My hamster's cheek pouch turned inside out — can I push it back in myself at home?
No. Cheek pouch prolapse (tissue turned inside-out and protruding) needs an immediate vet visit with no home treatment attempted. Beyond that, if the cheek stays full for more than a day, or there's a clear pain response to touch, it's safer to have an exotic vet check it out.
What should I check at home before going to the vet?
Think back on whether anything sticky or sharp (like nut shells) was in the food fed recently, watch whether the cheek stays full for more than a day, and check whether they show sharp pain or try to avoid being touched there.
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