I have a lump in my right armpit.  it is a hard lump with what seems like swollen area around it.  I can grab it and it seems bigger under the initial lump at the surface.  no pain.  no redness.  I pinched it and caused a bruise that disappeared overnight.  There is a bit of an itchy feeling but not constant.
HI. Armpit swellings are commonly caused by sebaceous cysts or lymph node enlargement. Both of them may be stuck to the skin and be hard. The Sebaceous cyst has a black spot in center, node will not have. It is more advisable to see a Surgeon to tell you the exact diagnosis and treatment as advised by him.