By Sarah Klein
A teen in the U.S. has been dealing with a strange medical mystery his entire life, and now doctors believe they have diagnosed it. Calvino Inman cries tears of blood, which can last from 15 minutes to an hour at a time. Doctors say the condition is known as Haemolacria — which causes a person to produce tears made up of other substances. However, they do not know what causes it.
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