My boyfriend says several times throughout the day today he s had an orange liquid drain out of his left nose. it is quite watery. he describes it like turning on a facet, then immediately off again. it s happened maybe 4 times today. He hasn t had any surgeries lately or injury to his head. However, last november he came down with a bad cold, and ever since that he has been complaining of fatigue. What can this orange liquid be?