Hot Spots on Dogs Guide: How to Treat Them Fast and Stop Them Coming Back

The thing that shocks most owners is the speed. Last night your dog was fine. This morning there is a patch on their neck, or their hip, or the side of their face, that is wet, red, angry and raw, the fur around it damp and matted, and your dog will not stop licking and chewing at it. It was not there yesterday. It seems impossible that skin can go so wrong so fast.

It can, and it has a name. What you are looking at is a hot spot, and in the space of a few hours it can go from a patch you would never notice to an oozing sore the size of your palm. The good news is that once you understand what a hot spot actually is, and crucially what keeps it spreading, you can act quickly, take the heat out of it, and get your dog comfortable again. This guide walks you through exactly what to do, and how to stop the next one before it starts.

What a hot spot actually is

A hot spot, known to vets as acute moist dermatitis, is a patch of skin that has become inflamed, infected and raw, and is being kept going by the dog's own licking, chewing and scratching. That last part is the key to the whole thing. A hot spot is not just a rash that appears and sits there. It is a cycle. Something makes a patch of skin itch or hurt. The dog licks and chews at it. That damages the skin surface and keeps it wet, bacteria take hold in the warm damp mess, the infection itches and stings far more than the original trigger did, so the dog licks even more, and within hours a tiny irritation has become a spreading, weeping sore.

That is why hot spots explode so fast, and why they almost never settle if you simply leave them alone. The dog cannot stop, because the more they lick the worse it itches. Left to run, a hot spot spreads outwards at the edges, the centre stays wet and raw, and it gives off a distinctive unpleasant smell.

Why summer is peak season

Hot spots can happen at any time of year, but they are far and away most common in the warm, humid months, and there are good reasons for that.

Heat and humidity mean skin stays damp and warm, which is exactly what the bacteria involved need to multiply. Swimming, paddling pools and wet grass leave the coat wet, and a thick coat that stays damp against the skin is a hot spot waiting to happen. Summer is also peak season for the things that start the itch in the first place: allergies are at their worst, fleas are breeding, and harvest mites are out in the grass. Any one of those can be the spark. So can an ear infection, an itchy anal gland, or a mat of fur pulling at the skin. The pattern is nearly always the same. Something makes the skin itch, the dog licks, and the hot spot ignites.

Thick and double coated breeds are especially prone, the Golden Retriever, the German Shepherd, the Saint Bernard and the Newfoundland among them, because their coats trap warmth and moisture close to the skin. But any dog can get one.

What to do right now

If your dog has a hot spot today, here is the order of play. The aim is simple: stop the licking, get air to the skin, keep it clean and dry, and take the itch and sting out of it.

Stop the licking. Nothing heals while the dog is still chewing at it. This is the single most important step. A recovery collar, a soft cone, or in the right spot a light t-shirt or medical pet top will physically break the cycle and give the skin a chance.

Clip the fur around it. This one feels counterintuitive but it matters enormously. Carefully trimming the fur back from the hot spot, using blunt nosed scissors or clippers and taking great care not to nick the sore skin, lets air get to the surface. Hot spots thrive under a damp cap of matted fur. Exposing the area to air is half the battle. If the spot is large or your dog will not tolerate it, this is a job for the vet or groomer.

Clean it gently. Gently clean away the discharge with cool water or a mild antiseptic cleanser and a soft pad. Be gentle. The skin is raw and painful.

Keep it dry. Here is where hot spots break the usual skin care rules. Most problem skin wants moisture. A hot spot wants to dry out. The whole condition is called moist dermatitis for a reason, and the path to healing is a clean, dry, exposed surface, not a covered, damp one. Pat it dry after cleaning and let air get to it.

Soothe and treat the raw skin. Once it is clean and dry, the area needs something that calms the inflammation, tackles the infection, and stops the itch that is driving the licking. This is where the right topical earns its keep, and it is what we come to below.

Deal with the trigger. Finally, ask what set this off. A flea you have not spotted? An allergy flare? An itchy ear? A mat? If you do not address the underlying itch, you will treat this hot spot and then meet the next one.

A word of honesty, and when to see the vet

Many hot spots, caught early, can be managed well at home. But some need a vet, and it is important to know the difference rather than to press on regardless.

See your vet if the hot spot is large or deep, if it is very painful and your dog will not let you near it, if there are several of them, if it is spreading despite your best efforts, or if your dog seems unwell in themselves, off their food or low in energy. Deep or extensive hot spots often need proper pain relief and a course of antibiotics, and sometimes what looks like a simple hot spot is something else that needs a professional eye. And if your dog gets hot spots again and again, that is not bad luck. It is a signal that there is an underlying itch, very often an allergy, that needs diagnosing and managing properly. Treating the spot without finding the cause is a treadmill.

No topical, ours included, is a substitute for a vet when a hot spot is severe or your dog is genuinely suffering. Good skin care is for taking the heat out of a manageable hot spot quickly, and for keeping the skin healthy so the next one never gets going.

Where DERMagic fits in

This is exactly the situation DERMagic was built for, and there is a product named for the job.

For the hot spot itself, the DERMagic Hot Spot Salve is the one to reach for and the one worth keeping in the cupboard before you ever need it, because hot spots never arrive at a convenient moment. It is a concentrated treatment made to do the three things a hot spot demands all at once: calm the raging inflammation, tackle the bacterial infection in the raw skin, and stop the itch that is driving your dog to keep licking. Clean and dry the area first as described above, then work the salve into the hot spot and the skin immediately around it. Breaking the itch is what finally lets the cycle stop and the skin start to knit back together.

For the underlying skin that let the hot spot start, especially if your dog is prone to yeasty, allergy driven skin, bathing with the DERMagic Peppermint and Tea Tree Oil Shampoo helps clean the coat, calm irritated skin and tackle the yeast and bacterial overgrowth that make hot spots more likely in the first place. Just be sure to dry the coat thoroughly afterwards, right down to the skin.

For the wider itchy, irritated skin that so often surrounds a flare, the DERMagic Skin Rescue Lotion is the flagship for calming the itch before it drives the next bout of licking.

And between flares, the DERMagic Skin Rescue Grooming Spritz in Lemongrass Spearmint is a simple way to freshen and soothe the coat after a summer walk or a swim, when the skin is most vulnerable.

The honest summary is this: the salve deals with the hot spot in front of you, and the rest of the range keeps the skin healthy enough that hot spots stop being a regular part of your summer.

How to stop them coming back

Prevention is mostly about denying hot spots the damp, itchy conditions they need. Dry your dog thoroughly after every swim, bath or wet walk, paying attention to the thick fur where moisture hides. Keep the coat groomed and free of mats, which trap damp against the skin. Keep flea prevention current through the whole summer, because a single flea bite can start the itch. Check and clean ears, since an itchy ear leads to scratching that tips over into a hot spot on the neck or face. And if your dog has allergies, managing them well over the summer is the surest way to keep hot spots away, because the allergy is so often the spark. Get on top of the itch, keep the skin dry and healthy, and most dogs can go through summer without a single one.

A hot spot is alarming precisely because it appears so fast. But speed cuts both ways. Act quickly, break the licking cycle, get the skin clean, dry and soothed, and a hot spot that looked frightening in the morning can be visibly calmer by the evening.

Frequently asked questions

What is a hot spot on a dog?
A hot spot is a patch of skin that has quickly become inflamed, infected and raw, kept going by the dog licking and chewing at it. Vets call it acute moist dermatitis. It looks wet, red and angry, often smells, and can spread within hours.

How do you treat a dog's hot spot at home?
Stop the licking with a collar or top, carefully clip the fur around the spot to let air in, gently clean it, keep it dry, and apply a treatment that soothes the skin and stops the itch, such as a dedicated hot spot salve. Then work out and address whatever triggered the itch in the first place.

Do hot spots go away on their own?
Rarely, because the dog keeps licking and the cycle keeps feeding itself. Most hot spots need you to break that cycle. A small one caught early may settle with prompt home care, but left alone they usually spread.

How fast do hot spots spread?
Alarmingly fast. A hot spot can grow from a small patch to the size of your palm within hours, because the licking and the infection drive each other. This is why acting quickly matters so much.

Should I cover a hot spot?
No. Hot spots heal best with air getting to a clean, dry surface, which is why clipping the fur around them helps. Covering one traps moisture and tends to make it worse.

Why does my dog keep getting hot spots?
Recurring hot spots almost always mean there is an underlying itch, most often an allergy, but sometimes fleas, ear infections or a coat that stays damp. If your dog gets them repeatedly, it is worth working with your vet to find and manage the underlying cause.

When should I take my dog to the vet for a hot spot?
See your vet if the hot spot is large, deep or very painful, if there are several, if it keeps spreading despite home care, or if your dog seems unwell. Severe hot spots often need pain relief and antibiotics.

This is general guidance for dog owners and not a substitute for veterinary advice. If the hot spot is large or painful, your dog is unwell, or you are worried, please see your vet.

Frequently asked questions

What is a hot spot on a dog? A hot spot is a patch of skin that has quickly become inflamed, infected and raw, kept going by the dog licking and chewing at it. Vets call it acute moist dermatitis. It looks wet, red and angry, often smells, and can spread within hours.

How do you treat a dog’s hot spot at home? Stop the licking with a collar or pet top, carefully clip the fur around the spot to let air in, gently clean it, keep it dry, and apply a treatment that soothes the skin and stops the itch, such as a dedicated hot spot salve. Then address whatever triggered the itch in the first place.

Do hot spots go away on their own? Rarely, because the dog keeps licking and the cycle feeds itself. Most hot spots need you to break that cycle. A small one caught early may settle with prompt home care, but left alone they usually spread.

How fast do hot spots spread? Alarmingly fast. A hot spot can grow from a small patch to the size of your palm within hours, because the licking and the infection drive each other. This is why acting quickly matters so much.

Should I cover a hot spot? No. Hot spots heal best with air getting to a clean, dry surface, which is why clipping the fur around them helps. Covering one traps moisture and tends to make it worse.

Why does my dog keep getting hot spots? Recurring hot spots almost always mean there is an underlying itch, most often an allergy, but sometimes fleas, ear infections or a coat that stays damp. If it keeps happening, it is worth working with your vet to find and manage the cause.

When should I take my dog to the vet for a hot spot? See your vet if the hot spot is large, deep or very painful, if there are several, if it keeps spreading despite home care, or if your dog seems unwell. Severe hot spots often need pain relief and antibiotics.