Why Does My Dog Keep Getting Skin Infections?

Short answer: a skin infection that keeps returning almost always means one of two things wasn't fully solved — the treatment course ended before the infection was actually gone, or whatever triggered it in the first place (an allergy, ongoing moisture, a hormonal condition) is still there. Telling bacterial from fungal, and working out why a course that should have worked hasn't, needs a vet and a microscope, not a guess. VitalPaws Pre + Probiotic does not treat a skin infection and we will not say it does; once your vet has it under control, it is daily gut support for the dog whose skin keeps flaring.

First, the red flags that mean don't wait

If the skin is broken, bleeding or oozing, has pus or a strong smell, there are sudden bald patches, or your dog is off its food or feverish, that's a same-day vet visit, not a wait-and-see — this comes before anything else here, including whether the infection turns out to be bacterial or fungal.

While you're getting there: keep the area clean and dry, stop your dog reaching it with a cone or soft recovery collar (constant licking keeps skin wet and slows healing), and take a photo in good light so your vet has a clear starting picture. Hydrogen peroxide is best avoided on broken or infected skin — it can damage healing tissue. Tea tree oil and other essential oils are toxic to dogs and should never go near the area. A leftover medicated shampoo or ointment from a previous course shouldn't go back on without checking first, since the wrong product can mask what's actually going on underneath.

Recognising a skin infection — and whether it's bacterial or fungal

Plain irritation is red and itchy and usually settles with basic care. An actual infection tends to add more: small pus-filled bumps or crusty patches, a distinct odour, patchy hair loss, or skin that feels thickened or looks darker than normal, alongside the itch. A bacterial skin infection is called pyoderma; a yeast infection of the skin is Malassezia dermatitis, named for the yeast that causes it; a fungal infection such as dermatophytosis (ringworm) usually looks different again — a more circular, less-itchy, hairless patch.

Guessing which one you're looking at by eye is unreliable, because bacterial and yeast infections can look and smell alike and often sit on the same patch together. A vet confirms it with skin cytology — a quick, painless swab or tape-strip sample read under a microscope, usually in the same visit — and adds a fungal culture where ringworm is suspected, since that one can spread to people and other pets in the house.

When antibiotics or steroids haven't worked

If a full course hasn't cleared it, or it clears and comes straight back the moment the medicine stops, that's usually one of three things: the underlying trigger was never addressed — an allergy such as canine atopic dermatitis, an untreated hormonal condition like hypothyroidism, or an ongoing flea or mite problem; the course was stopped as soon as the skin looked better instead of the full length your vet set, which is a common cause of relapse and also how bacteria become harder to treat next time; or the bacteria involved are resistant to what was tried.

This is exactly when a vet moves from "try a course" to a bacterial culture and susceptibility test — a lab sample that identifies precisely which bacteria are present and which medicine will actually work against them, instead of guessing again with a broader course. Chronic or deep infections that keep not responding as expected are often referred to a veterinary dermatologist for a fuller work-up, which can include an elimination diet trial to check whether a food allergy is the underlying trigger. None of this is a job for a home remedy or a leftover course from last time — the exact medicine, and exactly how long to give it, is a call only your vet can make once the tests show what's actually going on.

Puppies and skin infections: never an antibiotic on your own

A puppy's antibiotic — exactly which one, and exactly how much — is calculated from its precise body weight and the specific infection, after a vet has actually examined the skin. It is never estimated at home, never reused from another dog's leftover course, and never started without that exam. The wrong drug, or the right drug at the wrong amount, can fail to clear the infection, hide what a vet needs to see, and make the bacteria harder to treat the next time round.

If your puppy has a skin infection, a same-day vet visit is the right first step — puppies also decline faster than adult dogs, so "let's watch it for a few days" carries more risk at this age. Once your vet starts a course, ask exactly how many days it should run, and give it for that full length even after the skin looks back to normal.

What real customers say

From genuine reviews on the product page — not every dog's experience will match, but these are real:

What gut support can — and can't — do

To be direct: VitalPaws Pre + Probiotic does not treat a skin infection, bacterial or fungal, and we will not say it does — that's a vet's job, guided by what cytology or a culture shows. Keep giving anything your vet has prescribed exactly as directed, and mention to your vet that you're adding a pre + probiotic to the routine.

Once an infection is under control and the skin has healed, its role is daily gut support for the dog whose skin keeps flaring on repeat — real freeze-dried chicken liver, 4 billion CFU of good bacteria and inulin (prebiotic fuel for them), mixed once a day into the morning meal. A large part of a dog's immune system sits in and around the gut, which is why gut balance and skin reactions are often linked. Skin redness, rash or flaking is one of the most common concerns we hear: it came up for 23% of the 220 households who raised a concern on our post-order calls. It's also why every VitalPaws order includes a 1:1 teleconsult with Dr. Anvesh Chakravarthy, B.V.Sc & A.H., PetPulse Clinic — a place to bring exactly this kind of recurring-infection question.

For dosing by weight, see our dose guide, and for the fuller picture on why skin problems return at all, read Why It Comes Back. For a wider look at what's typically behind persistent scratching, see Why Does My Dog Keep Scratching All the Time? The Causes, Ranked.

Not visibly better by Day 30? Tell us and we refund 100% — no forms, no return shipping, keep the pack.