My twin brother has a week membrane in his nose too.. and he used to get at least 1 nosebleed a week when we growing up.. but usually more like 3-4. For no reason. At first it was kind of scary, but we got used to it. He still gets them on occasion, but not nearly as often (still just as bad though.. they last for hours and he coughs up the clot too!) Yuck. :)