my son has this all the time. i live in florida and his started about last july. and it gushes. he had so many one weekend, all weekend, that i lost count of how many that he has. when i talked to the dr. he said that it could be hereditart, and also that the capillaries in the nose dry out and pop. you can use ocean spray or also like an A&D ointment with a Q-tip in the nose to help moisten the capillaries.