Summer eczema in horses: causes, symptoms, and effective natural treatments
What is Equine Summer Dermatitis?
Recurrent Equine Summer Dermatitis (RESAD) is one of the most common skin conditions in horses. It is an allergic reaction to midge bites (small gnats) that causes intense itching and characteristic skin lesions. It affects approximately 5-10% of horses in Europe, appears in spring, worsens in summer, and recurs every year with often increasing intensity. To understand the mechanisms of recurrence, consult our article on RESAD and its recurrence mechanisms.
Causes of Summer Dermatitis
Allergy to Midge Bites
RESAD is a type I hypersensitivity reaction to proteins contained in midge saliva. These insects (1-3 mm) bite mainly at dusk and dawn, and proliferate in humid areas, ponds, manure, and dense vegetation areas.
Genetic Predisposition
Particularly predisposed breeds: Icelandic (up to 50% of imported horses), Friesian, Welsh Cob, Quarter Horse, Connemara, Shetland, Fjord.
Aggravating Environmental Factors
The condition of fragile skin plays a key, often underestimated, role. Other factors: proximity to wetlands, dense vegetation, manure and compost, hot and humid climate, stress, dietary imbalances.
Symptoms of Summer Dermatitis
Characteristic Clinical Signs
Intense itching (pruritus): the horse scratches frantically against any available support, rubs its tail and mane, and bites the affected areas.
Most affected areas: base of the mane and neck, base of the tail, topline, belly and chest, ears and head (severe cases).
Evolution of lesions: initial stage (red papules) → scratching stage (hair loss, scabs, weeping) → chronic stage (thickened skin, extensive hairless areas, open wounds, superinfections).
Impact on Horse Well-being
Permanent discomfort, behavioral disorders (irritability, agitation), weight loss, sleep disturbances, decreased performance.
Diagnosis of Summer Dermatitis
Diagnosis is based on anamnesis (seasonal appearance, annual recurrence, breed predisposition), clinical examination (characteristic location of lesions, intensity of pruritus) and exclusion of other causes (mange, ringworm). Allergy tests or a skin biopsy may be performed in atypical cases.
Conventional Treatments
Corticosteroids (reduce inflammation but significant side effects — laminitis, immunosuppression), antihistamines (variable efficacy), immunotherapy (variable results, long treatment). These approaches treat symptoms without addressing the cause.
Prevention and Management
- Insect protection: full insect sheets, fly masks
- Environmental management: stable horse at dawn and dusk, avoid humid areas, drainage, regular manure removal, favor windy areas
- Diet: omega-3, zinc, vitamin E, selenium to support skin health
Ozone: a Natural Solution for Summer Dermatitis
Why Ozone is Effective
Therapeutic ozone offers a natural and multi-action approach particularly suited to horse dermatitis: anti-inflammatory action (modulates pro-inflammatory cytokines), antipruritic effect (rapid relief of itching), antibacterial and antifungal properties (prevention of superinfections), stimulation of healing, strengthening of the skin barrier.
Usage Protocol
Acute phase (active lesions, intense pruritus):
- Gentle cleaning of affected areas, delicate drying
- Generous application of OZONE SKIN CARE to all affected areas (mane, tail, back, belly)
- Frequency: 1-2 applications/day for the first few days. It is not necessary to rub the product in.
Stabilization phase: reduce to 1 application/day until complete disappearance of lesions.
Preventive phase: OZONE SKIN CARE 2-3 times/week on sensitive areas, from the beginning of spring.
Expected Results
- Days 1-3: noticeable reduction in pruritus, calmer horse
- Week 1: decrease in inflammation, onset of healing
- Weeks 2-4: progressive hair regrowth, skin improvement
- Long term: reduction in severity of flare-ups
Severe dermatitis present for several years on a Shetland pony, treated in 6 weeks with Intensive Ozone Care.
Special Cases and Complications
Bacterial Superinfections
Scratching wounds can become infected. Ozone is particularly effective in these cases. Apply OZONE INTENSIVE CARE to infected wounds 2-3 times/day.
Severe Chronic Dermatitis
For horses suffering from dermatitis for several years with extensive lesions and very thickened skin, longer treatment is necessary. Be patient and consistent in applications.
Young Horses
Dermatitis can appear as early as 2-3 years of age. Early management with ozone can limit progressive worsening.
When to Consult a Veterinarian?
First appearance of symptoms (diagnosis confirmation), very extensive or superinfected lesions, no improvement after 2 weeks of treatment, general signs (fever, lethargy, significant weight loss).
Conclusion
Summer dermatitis is a frustrating chronic condition that deeply affects the well-being of the horse. While there is no definitive cure, proper management combining insect protection, environmental management, and adapted care can effectively control symptoms. OZONE SKIN CARE and OZONE INTENSIVE CARE are valuable allies in reducing itching, promoting healing, and improving your horse's quality of life.