<human>: I have a painful lump in the lower portion of my upper left arm.  A doctor that looked at it said it is a tumor but not sure of the type.  I noticed it 6 weeks ago.  I also have a painess tumor (unknown of cell type) in my left arm pit.  Should I be concerened?  Both have grown fast and since noticing tumors, they have doubled in size.
<bot>: Welcome to Chat Doctor. 1. Painless lump on the arm by location if it's at the joint it can be a ganglion.2. But else where on the arm and pain less - than goes in terms of lipomas (fat containing cells).3. To solve problem - I would have asked for an ultrasound scan - that would help to assess the nature of the lump, its source and its extensions. (both arm lump and axillary lump / arm pit)4. And if required an FNAC - fine needle aspiration cytology would be helpful to know the nature of the cells. The armpit / axillary region lump most probably an enlarged lymph node.5. So get an appointment and get the scan done and needful treatment done. Good luck Hope I have answered your query.Anything to ask do not hesitate. Thank you.