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Why is my Russian dwarf hamster losing fur and has a tail lump?

Updated On September 23rd, 2025

Pet's info: Other | Unknown - Other | Female | 1 year and 3 months old

Hi my Russian dwarf hamster loosing her fur, I took her to the vet and did a treatment for more but has got worse since. I have notice a lump next to her tail but not to sure if they might have got the sex wrong

1 Answer

Most Helpful Answer

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

Veterinarian

Published on April 23rd, 2017

Common causes of hair loss are mites or fungal infestation, allergies and nutritional deficiencies. If the treatment your local veterinarian gave is not effective another check up is required. Regarding the lump, it needs to be ideally assessed by your veterinarian to have a definitive and specific answer. Usually there are two ways your vet can do that a part from examining it directly during physical examination. A biopsy can be taken under local or general anesthetic, otherwise a smaller sample through a fine needle can be aspirated (this technique is called FNA= fine needle aspiration). Your vet may have a straight answer during physical examination. Please do not hesitate to contact us again on the forum or by requesting a consultation (where you can post pictures ) if you have any more questions or to discuss it any further.

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