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Mice/Mouse white swollen eyes


Just today one of my mice developed swollen eyes. There is no redness, the swelling appears to be coming from white patches underneath the mouse's eyes. She is behaving normally, but her eyes are squinted to half the size of their usual roundness. The eyes themselves appear to be unaffected other than the closing of the bottom lid. Any idea what could be the problem and how to fix it?

Thank you

Hi Marianne,

By any chance is there a vet in your area who works with pocket pets?  I am particularly concerned about the white patches you mentioned, but as I am not a veterinarian and cannot look at them in person, it would be a very good idea to have a professional take a look.

Two possibilities that come to mind include either an allergic reaction, or an infection.  An infection could result from anything new in the environment that is irritating her, something dirty or chemical that could have gotten in her eyes, or repeated scratching at her eyelids that became infected and swollen.  Again, the white patches are a concern, and I can't help you diagnose and address those until I know what they are.  If you cannot reach a vet, a local expert, or a rescue that handles mice, please write me back with a photograph and I will try to ask around and find out what could be causing this.

Also - is there any kind of discharge coming from the eyes or skin around them?  Is she weeping at all?  Are there any red scratches or scabs around the eye area?  Has anything new been introduced to her cage, room, diet, or routine?

It's a good idea for the time being to start her on some antibiotics if possible.  The following link explains how to administer tetracycline, which is an over the counter antibiotic you can find in the fish section of your local pet shop.  Of course, anything a vet would prescribe would be far better, but this is a good start if that is not possible.

Please do write me back if a vet isn't plausible so I can be of better assistance,


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I can answer questions regarding mice as pets, mouse behavior, color and coat genetics, breeding techniques, and general health questions. I can help with caging and setup, nutrition, social issues, and what to do in most mouse emergencies (such as unplanned litters, injuries, fighting, etc.). I can also assist with questions pertaining to orphaned mouse pups, weaning litters, and questions of mating and birthing. I cannot answer questions about exotic or wild varieties of mice such as spiny or pygmy mice. *****FOR EMERGENCIES, anything requiring immediate medical intervention, PLEASE take your mouse to a professional veterinarian or wildlife rehabilitator who works with mice as soon as possible! IMPORTANT RESOURCES: Raising Orphaned Mice: Orphaned Mice Videos: Natasha's Your First Mouse: General Mouse Help: Mouse Info and Exotic Breeds:


I have enjoyed the companionship of mice nonstop since 2004, and spent a year caring for them in a lab where I learned a great deal about their breeding, social needs, and health. I spent a few years breeding them, specifically working with albinos, marked mice, angora mice, and satins. My education never stopped - I am learning something new every day from current and well-established research thanks to the wonderful folks at the Jackson Laboratory, as well as from my wonderful mousey friends online. I also love learning from my terrific questioners here on AllExperts - you folks keep my passion for these amazing animals alive and well!

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