Conversation: The conversation between human and AI assistant.
[|Human|] I have a lump/cyst that formed on my vein under my left arm in between my arm pit and elbow area. It started off very small to where I never noticed i had a lump there till I raised my arm and saw dark purple Bruise dot. When I touched it the pain was not bad at all. Then with time it has gotten tad bit bigger and the bruise dot turned into a thin dark purple line about the width of a pinky nail and when u touch it now it has become very painful. At times I have slight throbbing pains pulsing from that area. I am not sure if the lump can rupture my vain because it is on it and it worries me. I dont know what I should do
[|AI|]  Welcome to Chat Doctor. 1. The history suggests the possibility of the curiosities of the superficial venous system.2. Second possible cause could be localized skin infection with edema.3. If you are my patient I would have examined you and ask for an ultrasound Doppler study of the left upper limb along with the lump / lesions scanning.4. The ultrasound will exactly give the result of nature of the lesion (solid mass, cystic, vascular cause) and source of the lesion and where all it is extended.5. At the Sam time it will assess any minute thrombus or perforators (incompetent)causing this effect. Good luck. Hope I have answered your query.Anything to ask do not hesitate. Thank you.