Sweat is normally in the form of a colorless liquid. But some people may have sweat blood. Extremely frightened or stressed gigantic man suspected to be triggered sweat blood.

Cases of people experiencing blood sweat fairly rare. This condition is called hematidrosis (Sweat Blood), which in certain conditions can be caused by another disease or high blood pressure.

Dr. Frederick Zugibe, a forensic expert from New York said hematidrosis is one extreme side effects of fight or flight response. Most occur when a person experiences stress anxiety or fear that very deep.

Anxiety and fear are so strong can cause tiny blood vessels that supply the sweat glands become tighter and smaller, so that when blood vessels dilate bleeding will occur.

At the time of being stressed out will generally sweat more, and when blood vessels are dilated which came out back then sweat on the skin surface will be mixed with the blood that makes people call it blood sweat.

Sweating blood can indeed scary and very rare. But this condition is usually associated with other diseases such as hemochromatosis, which is the condition of danger
which iron is stored in many forms and body so that makes a person vulnerable to hematidrosis.

In addition there is also another theory that says that the extreme anxiety or fear experienced by a person causes the release of a chemical that can be
break the capillaries in the sweat glands. As a result there is a small amount of bleeding so that the sweat that comes out along with blood.

Dr. Zugibe said some cases associated with hematidrosis reportedly occurred when a person experiences fear of punishment before the execution and there is also  due to fear of storms while sailing center.

Effects that occur in the body associated with this hematidrosis include weakness, mild to moderate dehydration and high anxiety makes a person sweat to sweat blood.