08/10/2026
🪰 SUMMER SORES: SMALL WOUND, BIG HEADACHE! 🪰
Swipe through this before & after of this summer sore. Presented on June 18th & was healed by August 3rd.
Summer sores, also called cutaneous habronemiasis, are caused by Habronema larvae that are deposited into wounds by flies. Once those larvae are present, the horse’s immune system can mount a significant inflammatory response, causing a wound that may become raised, ulcerated, proud-fleshed, and stubborn to heal.
Summer sores can be frustrating because they can linger for weeks or months, especially when fly exposure continues. They most commonly develop around the lips, eyes, nostrils, and other areas prone to small wounds and fly activity.
For this case, we used a multimodal treatment plan —
AGGRESSIVE FLY CONTROL
Fly control is HUGE when dealing with summer sores. This horse wore a fly mask with tassels, and we utilized Swat and fly spray to help minimize additional fly exposure.
TOPICAL THERAPY
Our special S4 cream was applied as part of the treatment plan to address the lesion locally and support healing. This cream is designed to decrease inflammation, infection, & deter parasites topically.
CLASS 4 VETERINARY LASER
Laser therapy helps reduce inflammation, support circulation, and promote healthy cellular function — all of which promotes a happy wound. We incorporated regular laser treatments throughout the healing process to support the body’s natural ability to repair the damaged tissue.
DEBRIDEMENT
The sore was debrided regularly to remove sulfur granules associated with the inflammatory process. This helped keep the wound cleaner and gave the healthy tissue a better environment.
One of the classic findings in a summer sore is “sulfur granules.” These are small yellowish, gritty-looking granules made up largely of dead tissue, inflammatory material, and colonies of organisms associated with the larvae. They can become embedded within the lesion and contribute to inflammation. Debriding this is an important part of managing these sores.
DEWORMING
A veterinarian-directed deworming protocol was also incorporated.
VETERINARY-DIRECTED ANTI-INFLAMMATORY THERAPY
Because of the significant inflammation associated with this particular lesion, a regional anti-inflammatory treatment was administered as part of the veterinarian-directed plan.
If a wound seems unusually inflamed, doesn’t heal normally, or just keeps coming back during fly season, it’s worth having your veterinarian take a closer look.