Capped Elbow in Horses: Shoe Boils, Causes, and Care Path

Capped elbow guide

Capped Elbow in Horses

Capped elbow, often called a shoe boil, usually comes from repeated pressure or trauma near the elbow when the horse lies down. Prevention and fit matter as much as topical support.

Quick answer: A capped elbow is commonly related to repeated pressure from the hoof or shoe against the elbow. Check bedding, shoeing, hoof contact, lying-down habits, and whether the swelling is soft, hot, painful, open, or infected-looking.

Call your vet if

  • The swelling is hot, painful, draining, open, or increasing.
  • The horse is lame or reluctant to lie down/rise.
  • There is a wound, infection concern, or repeated recurrence.
  • The area needs draining or invasive care. Do not attempt that yourself.

What to check

  • Does the shoe or hoof hit the elbow when the horse lies down?
  • Is bedding deep enough?
  • Does a shoe-boil boot or management change make sense?
  • Is swelling soft and cool or hot and painful?
  • Is there broken skin, scabbing, drainage, or infection concern?

Support path after red flags are ruled out

Related guides

Educational support only. Capped elbow management often requires pressure prevention, bedding changes, farrier awareness, and veterinary care when inflamed or open.