Researchers are diagnosing a rare phenomenon in which a woman cries blood tears while menstruating. The study, published in BMJ, calls the condition haemolacria. The research followed a 25-year-old woman who was admitted into the hospital when she began to experience crimson tears during the beginning of her period. Scientists say the flow of blood can be sometimes rerouted outside of the uterus, seeping out of places like the nose, nipples or even eyes. Typically, haemolacria is associated with health problems, but this particular woman didn't show any such issues. She was given hormonal therapy for three months, which helped to stop her unconventional bleeding. Researchers say more investigations should be done in order to find out why such random occurrences happen.