So this Friday I came home from work and noticed that I had a small lump in my armpit (I am a 19 year old female).  I wear a tight shirt a work and sweat a fair bit there.  And I thought the pain I was feeling was the shirt rubbing.  It was when I got home I noticed the lump.I went to the ER that Saturday night because I was worried.  When I had got there the lump was almost gone.  The doctor felt what he called the remnants of it.  He said it was an auxiliary mass or something.  Well yesterday I got home from a party and noticed that the lump had returned.  Its about the size of a pea and is in my left armpit.  Its in the same exact spot the one was previously.  I am freaking out and having wicked bad anxiety.  I felt better after I saw the ER doctor but freaked out again when it came back......whats going on?
Welcome to Chat Doctor. 1. The history and symptoms suggest the possible cause will be hair follicle infection / inflammation with collection, next could be lymph nodal enlargement.2. The infection can be treated with a course of antibiotics, whereas the lymph nodal enlargement will occur due town infection or inflammation anywhere in the body.3. So any illness you are aware of can be treated.4. As a remedy do not use tight shirt until complete healing, use soft clothing which will not cause the rubbing, avoid squeezing, pressing the lump - as you can complicate and disturb healing process.5. Avoid shaving, meanwhile you use trimming till complete healing - that will help.6. Apply local anti-inflammatory cream with remedies explained - should be well in a couple of days. Good luck. Hope I have answered your query,anything to ask do not hesitate to ask.http