how to treat hair follicule infection in dogs?

My guess would be canine acne, which I am familiar with as it is a common problem in the Doberman but easy to treat once a vet has examined the dog, taken a skin scraping to confirm the suspected diagnosis and would also guide the vet in prescribing treatment to clear the skin.

My current Doberman has recurrent on his chin and muzzle which happens when plugs of sebum obstruct the hair follicles, resulting in raised red pimples that can break open and bleed causing irritation. To alleviate the discomfort he rubs his head on the couch or door frames, and when I see that the first thing I do is check him over for acne.

Acne typically occurs at the onset of puberty and can reoccur throughout a dog’s life. Treatment can be a topical antibiotic cream for mild to moderate acne (Bactroban a topic cream for acne in humans is extremely effective for treating canine acne, inexpensive and prescribed by my vet) or short course of oral antibiotics if it is more severe.

When acne is playing up insure the dog’s chin is wiped clean after eating to remove food debris.

You can try a good antibacterial cleanser daily. Dogs can get acne. If that doesn't clear it up, he may need antibiotics.

My brothers pug had the same problem. He was allergic to the kind of food bowl they had for him. Stay away from any rubber or plastic bowls and toys for a while and see if that helps.