What causes a rash under my dog's tail and constant scratching?

This could be beginning of flea allergy or problems with anal glands. The best way to approach it in this case, will be to get a good flea product, (ideally spot-on form) and apply on Daisy's neck . Please, keep the cone on as it is important that Daisy is not licking the sore area. You should bath the wound with disinfectant (ideally, containing chlorexidine) for 4-5 days. Anal glands can be emptied by an veterinary technician or experienced dog groomer - may be worth to get her anal glands checked too. If this doesn't help you will need to take Daisy to your local vet to get treatment.

Unfortunately, you can’t tell the cause of the rash just by looks alone. It’s possible this is related to fleas in the environment or that this is an allergic reaction. This could also be related to hypothyroidism. I recommend to discuss treating him with a good flea product like Simparica with his veterinarian. If you must use an over-the-counter product, use Frontline. This is still a good product but there are some resistance with fleas. Make sure to protect the area from any licking or scratching with an Elizabethan collar. You can wash the area once a day and rinse it well. Start him on an omega-3 fatty acid supplement. If this does not start to look better within a week or if it starts to get worse, have him examined by the veterinarian. I hope this helps and please feel free to post any additional questions.

It looks like he has a skin infection. You could bathe him with an antibacterial dog shampoo but he will likely need an oral antibiotic to treat the infection. Call your vet and schedule an appointment for treatment.

It looks like your dog has a skin infection, most likely caused by allergies or fleas. The allergies can be from a protein in her food or to something in the environment, like grasses, pollens, dust, etc. The allergies cause a breakdown in the skin barrier and make the dog very itchy. The excessive itching and licking cause the skin infection. I would recommend taking Rex in to see the vet so he can be started on some antibiotics to help clear up the skin and get on a good flea control. You may also ask about a medicated shampoo, these can help clear up the skin more quickly. I would also recommend discussing with your vet some options for medication to help control the allergy symptoms like Atopica, Apoquel, or Cytopoint. Good luck!

It sounds like your pup needs to go back to the veterinarian. If you don't trust the clinic, I recommend to get a second opinion. I'm not sure I understand if the tech addressed the rash or not. The tech cannot prescribe any medication or treatment. If they did see the rash, they can't do anything about it. They can only express anal glands and can give limited advice. Only the veterinarian is licensed to actually treat the rash. If your pet did not get examined by the veterinarian, she would not receive medical treatment for the rash. Every pet is different and some pets may need their glands expressed every few weeks. Most however will be less frequent. This can be a problem in any dog but it is more common in small dogs. There is a supplement called glandex which many pets respond well to. This however may interfere with your food trial and I don't recommend starting it without first discussing it with your veterinarian. Lastly, your vet is correct that sometimes frequent anal gland issues can be a sign of allergies. It sounds like you are on a food trial already. Keep in mind you must be very strict on this food trial and that it will take 12 weeks to see results. Please feel free to post any additional questions.

There are several conditions that can cause these symptoms. You'll want to try to keep the area as clean and dry as possible and prevent any licking. This will help prevent any secondary bacterial or yeast infection from forming. Be sure to visit your local Veterinarian and request a Skin scraping exam. This will allow your doctor to rule out any mites, mange, or fungal infection. Your doctor should be able to prescribe a treatment plan to clear this up pretty easily.

Most likely it is an allergy but it could also be a heat rash or a bacterial or fungal infection. I suggest you use this topical mousse on the affected areas to see if that helps. If not, she should be examined by your vet. ( https://www.allivet.com/p-6679-douxo-calm-mousse-for-dogs-and-cats-68-oz.aspx )