Hi, within the recent year or so, my mom has developed what appears to be a lump on her left elbow. The lump varies in size, from day to day. Also, it sends tingling sensations down her arm, sometimes pains her, and sometimes developes a light red skin rash. We have been to many doctors, and none know the reason. The X-Rays come up clean every time. I'm not sure if this pertains, but she is 49, has had Von Willebrans(an anemia disorder) her entire life, she gets migraines frequently, and has been on birth control for 2 years to help retain her iron levels for the Von Willebran's. Her general physician agrees there is a problem, but lacks the specialization to send her for the necessary tests without the referral of another doctor. Please help, so we can finally know what's wrong, and fix it. thank you so much.