What does it indicate if a horse is sweating excessively while resting?

Sweating excessively in a resting horse is often a sign that the horse may be experiencing distress or is ill. While it's normal for horses to sweat during exercise or in hot weather, excessive sweating when the horse is at rest can indicate underlying health issues such as heat stress, pain, illness, or anxiety. A healthy horse typically maintains normal body temperature and does not exhibit excessive sweating without a clear reason, like exercise or heat exposure. Therefore, noticing a resting horse that is sweating profusely should prompt immediate investigation into its health and well-being.