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Dog has fleas, hot spots, and a rash from her flea collar. What to do?

Updated On September 23rd, 2025

Pet's info: Dog | Pomeranian | Female | unspayed | 3 years and 2 months old | 9 lbs

My dog got fleas and they went away and she started to get rashes/ hot spots. I bought her a hot spot spray to help and fleas came back after a walk and I purchased a flea collar and fleas won’t go away and the collar caused her to get a rash on her neck. What’s the best thing to do?

1 Answer

Most Helpful Answer

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Answered By Lotus Altholtz

Veterinarian, Board-Certified Lab Animal Medicine Specialist

Published on March 3rd, 2019

I recommend purchasing Capstar (available OTC at PetCo) to kill the live fleas as quickly as possible and starting an oral flea/tick preventative such as Nexgard/Simparica or Bravecto (all of these are far more effective than any collar or topical flea product). You may be able to purchase one of these from a vaccine clinic such as vippetcare.com or Vedco.com without paying an office visit fee. Your vet will be able to prescribe a topical steroid/antibiotic ointment or powder such as Dermavet or Neopredef powder that will be more effective than OTC hotspot spray, however the bigger issue is daily vacuuming and laundering your home to remove all the flea eggs that may have already been deposited and will hatch and re-infect Chanel if she is not continuously on monthly oral flea/tick prevention year round. Environmental clean up after a flea infestation is key! Good luck!

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