06/30/2026
🌧️ Rain Rot: What It Is and Why Your Horse Has Crusty Spots
No, rain rot isn’t actually caused by rain. 🤯
Rain rot (also called rain scald) is a bacterial skin infection caused by Dermatophilus congolensis. It thrives in warm, wet conditions and can affect horses year-round if their skin stays damp.
🔍 Signs of Rain Rot:
✔️ Small bumps or scabs along the back, topline, rump, or neck
✔️ Tufts of hair that pull out easily with scabs attached
✔️ Crusty, flaky skin
✔️ Tender or sensitive areas when touched
✔️ Severe cases may have hair loss and raw skin underneath
🌧️ How Horses Get It:
• Standing in wet conditions for extended periods
• Blankets trapping moisture against the skin
• High humidity
• Poor grooming practices
• Skin damage from insects, scratches, or rubbing
🩺 Treatment:
✔️ Remove scabs gently (don’t rip them off)
✔️ Use antimicrobial shampoos as directed by your veterinarian
✔️ Keep the horse as dry as possible
✔️ Clean brushes, blankets, and grooming equipment
🚫 Common Myth:
“Just leave it alone and it’ll go away.”
Sometimes it does—but untreated cases can spread, become painful, and lead to larger areas of skin damage.
💡 Prevention:
• Allow horses to dry completely after rain or bathing
• Wash blankets regularly
• Don’t share grooming tools between horses with active infections
• Maintain good nutrition and overall health
Rain rot may look ugly, but with prompt treatment, most horses recover quickly and completely.
🐴 Have you ever dealt with rain rot? How bad was the worst case you’ve seen?