What causes a rash under my dog's tail and constant scratching?
Updated On September 23rd, 2025
Pet's info: Dog | Mixed Breed | Male | unneutered | 6 years and 9 months old | 13 lbs
My dog has been rubbing off or trying to scratch under his tail, and I realized it’s like a rash. It bothers him all the time. His name is TJ & he is 6 years old (July 8, 2011). He is a mixed - chihuahua and greyhound.
3 Answers
Most Helpful Answer
Published on April 14th, 2018
This likely a bacterial infection that will need to be cleaned and disinfected by your veterinarian and then requires prescription ointment and an oral antibiotic. Your dog may also have a food allergy. Please make an appointment with your vet for an exam.
1Pet Parents found this answer helpful
Related Answers from Veterinarians
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Published on February 24th, 2017
Poor Chili! The most common cause of a rash with excessive itching near the base of the tail is fleas - so if she isn't currently on a good quality flea control medication like Nexgard, Bravecto, or Trifexis, this is the first thing I would suggest. Other possible causes of the rash and itching would include allergies, a bacterial or fungal skin infection, or skin mites (mange). It sounds like she may need antibiotics and a short-term steroid or other medication to help resolve the itching, so I would recommend taking her to the vet for an exam when you are able to.
1Pet Parents found this answer helpful
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Published on May 15th, 2019
It looks to me like he most likely has a skin infection from scratching or licking. It could be due to fleas or some sort of allergy. He may need some antibiotics to clear the infection. You could try applying a hydrocortisone cream to try and relieve the itching but may need stronger antibiotics from a veterinarian
1Pet Parents found this answer helpful
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