Is it true that Persian horses sweat blood?

The notion that Persian horses sweat blood is a myth and not scientifically accurate. Horses, including Persian breeds, can appear to sweat blood due to a condition called "hematohidrosis," where sweat mixed with blood seeps through the skin, often triggered by extreme stress or exertion. However, this is a rare phenomenon and not characteristic of the breed. In general, horses sweat in a normal physiological manner, producing a salty fluid to regulate their body temperature during exertion.