Hi I Am A 66 Year Old Woman. I Recently

Hi i am a 66 year old woman. I recently have had a problem with my blood not clotting. If i cut myself and it isn't deep it drips and goes through several bandages and tissues. It may take ten to fifteen min. to stop. I never have had this problem before. I curious to what might be the cause. Is there a need for concern. Thank you so much for answering my question.