Hot Spots in Dogs: Quick Treatment for Acute Moist Dermatitis
Hot spots appear suddenly and spread fast. Learn what causes these painful, oozing skin lesions and how to treat them quickly.
Hot spots (acute moist dermatitis) are red, oozing, painful patches of skin that seem to appear out of nowhere and spread rapidly. They're most common in warm, humid weather — like Macau's summers — and in thick-coated breeds like Golden Retrievers, German Shepherds, and Labrador Retrievers.
Key Points
- Hot spots can develop and spread within hours
- They're triggered by anything that causes initial itching
- Warm, humid weather increases risk
- The area must be kept clean and dry to heal
- Most hot spots need professional cleaning and medication
- Preventing the underlying itch prevents recurrence
What Are Hot Spots?
A hot spot starts when your dog scratches, licks, or chews an area of skin (often from an insect bite, allergy, or minor wound). The moisture from licking and the bacteria on the skin create a rapidly expanding area of infection. The result is a red, oozing, painful patch that's hot to the touch — hence the name. They can grow from a small spot to a large lesion in just 24 hours.
Immediate Home Care
If you spot a hot spot, gently clip the fur around the area to let air reach the wound. Clean it with a mild antiseptic (chlorhexidine solution). Keep your dog from licking it — an e-collar may be necessary. Do NOT apply ointments or bandages without vet guidance, as trapping moisture can make it worse. Then get to the vet as soon as possible.
Veterinary Treatment
Your vet will clip and clean the area thoroughly, removing all matted fur and debris. They'll prescribe antibiotics (oral or topical) to fight the infection, anti-inflammatory medication to reduce pain and swelling, and possibly a topical spray. An e-collar prevents further self-trauma. Most hot spots heal within 7-10 days with proper treatment.
Prevention
Preventing the underlying cause of itching is key. Keep up with flea prevention, manage allergies, dry your dog thoroughly after swimming or bathing, and groom regularly to prevent matting. In hot weather, check your dog daily for early signs of skin irritation.
When to See a Vet Immediately
- A red, oozing, painful patch appears suddenly
- The spot is growing rapidly
- Your dog is in obvious pain or distress
- There's pus or a bad smell from the wound
- The hot spot is near the eye or ear
- Multiple hot spots appear at once
How RVC Can Help
RVC can treat hot spots quickly with professional wound cleaning, targeted antibiotics, and pain relief. We'll also investigate the underlying cause to prevent recurrence. Walk-ins welcome for urgent skin issues — call +853 6677 6611.
This article is for educational purposes only and does not replace professional veterinary advice. If your pet is showing any symptoms, please contact Royal Veterinary Center immediately at +853 6677 6611.