Bleeding is probably a sign that you need to clean your teeth and gums more thoroughly – not leave them alone. Your gums might bleed the first few times you use Willo if you have harmful gum inflammation, the beginnings of gum disease. If you keep using Willo and floss gently, the bleeding typically stops within a week or two. However, if the bleeding persists or you experience heavy gum bleeding or severe pain, please contact your dentist or physician.