Hot spots (also called acute moist dermatitis) are one of the most common skin issues dog parents notice “out of nowhere.” They can show up fast, look alarming, and get worse quickly if your dog keeps licking or scratching the area. The good news: once you know what to look for and what typically causes them, you can act early and help your dog get comfortable again.
What hot spots look like
Hot spots are usually:
– Red, inflamed patches of skin that can look raw
– Moist or oozing areas (sometimes with a shiny, wet appearance)
– Hair loss around the spot where the fur looks matted or thinned
– A strong urge to lick, chew, or scratch the area
– Tenderness—some dogs pull away or react when you touch it
They often appear on the neck, cheeks, hips, thighs, or base of the tail, but they can show up anywhere. Because the skin is irritated and damp, hot spots can develop a noticeable odor and may become infected.
Common causes of hot spots
Hot spots are usually triggered by something that irritates the skin, followed by licking and scratching that breaks down the skin barrier. Once the skin is damaged, bacteria can multiply quickly—especially in warm, humid conditions.
Here are the most common causes:
– Allergies (environmental, food, contact irritation)
– Fleas and other parasites
– Moisture trapped in the coat (swimming, baths, rain, humidity)
– Matting and poor airflow to the skin
– Skin wounds or irritation
– Ear infections (dogs with itchy ears may scratch and rub, creating irritation on the neck/cheek area)
What to do if you suspect a hot spot
Because hot spots can spread quickly, it’s best to act early.
– Prevent licking and chewing (an e-collar/cone is often needed)
– Keep the area clean and dry
– Avoid human creams or random home remedies—some can trap moisture or irritate the skin further
If the area is large, very painful, oozing heavily, or your dog seems uncomfortable, it’s smart to contact your veterinarian. Hot spots sometimes require medicated topical treatment, oral medication, or a plan to address the underlying trigger.
Prevention tips
Hot spots are often preventable with a few consistent habits:
– Keep up with flea prevention
– Dry your dog thoroughly after baths or swimming
– Brush regularly to prevent mats and improve airflow
– Address allergies early (itching is a warning sign)
– Check ears and skin weekly—catching irritation early makes a big difference
If you’re unsure whether you’re seeing a hot spot or something else, take a clear photo and reach out to your vet for guidance.
