hi welcome to health care majic my name is Dr Ehsan I have been through your query regarding this nasal bleeding issue there are several causes and associated conditions which can cause nasal bleed use of certain drugs like -aspirin - Non steroidal anti inflammatory drugs -warfarin -heparin history of hypertension, history of easy bruising or easy bleeding after minor surgical procedures , foreign body in nose nasal trauma and many other factors if this condition is persisting , you need to have evaluation by your physician , preferably ENT specialist ... hope this answer covers your question. if anything unclear, just let me know. regards