Best dental clinic in Keelkatalai Bleeding from Gums There are several reasons why your gums might bleed. In most cases, oral health-related issues cause it. But it can also be a symptom of other health conditions. Dental causes include Poor oral hygiene Smoking Gingivitis Periodontitis Trench mouth Other causes include Diabetes Hormone changes during puberty, pregnancy or menopause Vitamin K deficiency Vitamin C deficiency or scurvy Blood-thinning medications Pernicious anemia Thrombocytopenia Hemophilia Von Willebrand disease Oral herpes HIV/AIDS Stress Leukemia