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My dog has severe fleas, hair loss, scratching, and a lump. Help!

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Female | spayed | 2 years and 1 month old | 70 lbs

Hey, coco has fleas really bad and I’ve tried just about everything under the sun to fix it. She’s lost her hair on her ears legs and back, and she won’t stop scratching or biting. Now she has a big hard lump on her back where she chews at and it sometimes while she walks she shakes her back legs. How do I get her hair back fast and what about the lump?

1 Answer

Most Helpful Answer

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Answered By Chad Brown, DVM

Veterinarian

Published on August 3rd, 2018

Hello and thank you very much for your question. Fleas can be so frustrating and I sympathize with what you were going through. What has to happen for your dog to heal and for the lump to possibly go down, Is for the itch cycle and the inflammation to be stopped. A visit to the local veterinarian is a must in this situation because they will have strong prescription strength flea preventative as well as steroids that can be given to your dog to stop the fleas and therefore the dermatitis that’s associated with their biting. I urge you not to use any further over-the-counter flea preventative or skin medications without the approval from your veterinarian. This will only delay the healing and may exacerbate the problem. The lump should go down with time as long as the fleas are killed and the inflammation of the skin is controlled. But, if the lamp does not go away within the next two months, you may want to have your veterinarian take a biopsy of it just to see if it is indeed even related to the fleas. Does that make sense? I appreciate you reaching out to our service. I hope I’ve helped you today.

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