 [ Symptoms ] what is dyspnea [ Disease ] it would be concerning if a cause is not apparent dry air colds sinus infection nose picking trauma all can cause nose bleeding it would be concerning if this happens frequently or if he is having bruising in other parts of his body without apparent trauma nose bleeds need to be stopped properly and many people do not do it correctly use your search engine for nosebleed or epistaxis management on webmd and you will find the right way