 [ Symptoms ] should i be concerned that my child vomited blood and mucus after a nosebleed  she then broke into a cold sweat and passed out for a few seconds this was the first time she has had a nose bleed [ Disease ] this could be a case of sintheria messikoma and may be on and off for up to three years or it could be a mild to severe case of genital herpes and i recommend you visit your local clinic for a check up