What causes lump on forearm?
Patient: hello, i am a 27 year old female, healthy, with a history of no major medical problems. twice in the past couple months, a large lump has appeared on my forearm (once on the outside of the right arm, and then on the inside of my left arm) which is then surrounded by a huge bruise within several hours. both times, this occured without any trauma to the affected area. any ideas why this is happening? thanks! Doctor: Hello hope the answer helps you.As you mention that without prior trauma noticed bruised lumps in arm twice.I think a detailed histroy as for any bleeding diathesis as maleena,hematochazia needs to be sought but otherwise you are healthy fit person and any bleeding disease in family and not on  any anticooagulants then better you sit and wait to see it resolved out  as not associated with fever to clue anywhere.If stll happens again in future then needs consultation