I was hoping for some responses but also want you to have an answer. Folliculitis is basically a skin dermatitis. Often this is secondary to another condition such as mange mites, flea infestation or allergies. Actually any condition that causes a dog to itch excessively can then damage the skin and lead to a decreased response from the skin's immune system. When the immune system is not working properly, the staph and yeast normally present in the dog in small numbers multiplies unchecked and becomes a skin dermatitis such as staph or yeast dermatitis.
. Staph usually occurs on the lower regions of your pet and tends to have small pimple type bumps. Shampoo containing Chlorhexiderm and/or Oatmeal can help with this condition. Yeast typically shows as a greasy area that has a sweet musty odor. Sometimes the skin can become inflamed, darker and thickened due to itching. Yeast likes areas such as between toes, armpits and ears. Selsun Blue Shampoo can help with Yeast dermatitis. When shampooing, lather and leave on 15 minutes before rinsing. These shampoos are not meant to be a cure, just a relief until your pet can see a Vet. Benadryl can be given to your dog, the dose is up to 2mg per pound every 8 hours for itching due to allergies.
You can read about allergies here: http://www.vcahospitals.com/main/pet-health-information/article/animal-health/allergy-general-in-dogs/428
Here is a site that goes over itching in dogs.
Now you can treat the dermatitis but as long as the underlying condition is still present then the problem will continue or come right back. For instance, you can treat the skin dermatitis with antibiotics and shampoos and an antiinflammatory medication. The skin dermatitis might clear up, but if your dog is allergic to say wheat and is still being fed a food that contains the allergen, the skin dermatitis will just return as soon as the medication is discontinued if it even cleared up with the medication.
So it is important to have necessary tests done to rule out mange mites (skin scraping) and allergy testing if mites are not found. I'd have your son talk to his vet about these tests first.
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