A medical disorder in which the blood's capacity to clot is greatly impaired, causing the patient to bleed excessively from only a minor injury. Usually the disorder is caused by an inherited lack of a coagulation factor, most often factor VIII. It is a condition where blood usually doesn't clot. After any injury or damage, excessive bleeding (external and internal) happens when blood can't clot properly. Symptoms include several large or deep bruises in the urine or stool, joint pain and swelling, unexplained bleeding and blood. Treatment requires doses of plasma or a clotting factor. Share your comments on topic Email us: clingenom@peerreviewedjournal.org Submit your submission through direct online link: https://www.scitechnol.com/submission/ For more information visit our website: https://www.scitechnol.com/ We accept more than one paper for one author you can also go for membership.