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Why is my hamster's red, scabby rear spreading and losing hair?

Updated On September 23rd, 2025

Pet's info: Small Animal | Unknown - Small Animal | Male | unneutered | 7 months and 22 days old | 0.45 lbs

My hamster’s behind is red, dry/scabs, and losing hair. It seems like it’s spreading because it used to be small. I tried washing it off at first because it look like he was dirty/dry fur. I don’t know if it’s from stress or if the other hamster is hurting him. I’ve sperated the injured on to see if he heals but what should I do?

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2 Answers

Most Helpful Answer

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Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS

Veterinarian

Published on September 9th, 2018

This presentation could be due to a trauma or localized spot of skin infection (likely to be caused by bacteria). A check up, appropriate disinfection and possibly antibiotics (oral, topical or in a shampoo formulation) are needed to solve the problem. Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further.

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    Answered By Linda G, MS, DVM

    Veterinarian

    Published on October 18th, 2017

    Hello, & thank you for using Petco Pet Education Center. Hairloss & red skin could be an indication of some type of allergic response, ectoparasites like fleas, lice or mites, or even ringworm. A quick visit with your verterinarian will sort things out quickly & make sure Seamus' skin issues are not too serious. Take care.

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