A few days ago I had a sharp pain on my knee followed by a big bruise, I didn't injure it. That was the first time it occurred on my knee but I do have occurrences on the fingers. Sharp pain, feels like a slight bump to the touch and then a big bruise appears. It comes suddenly with no trauma. I am 43 years old and have had this happen to me since I was young. My mother and sister also have it. I have consulted my doctor but he doesn't know what it is. Any help?
"Ask a Doctor" questions are answered by certified physicians and other medical professionals.
For more information about experts participating in the "Ask a Doctor" Network, please visit our
medical experts page.
You may also visit our Blood Disorders , for moderated patient to patient support and information.
The information provided on eHealth Forum is designed to improve, not replace, the relationship between a patient and his/her own physician.
Personal consultation(s) with a qualified medical professional is the proper means for diagnosing any medical condition.