I have a small lump under my left armpit that is very sensitive and painful around ovulation.  Im 44 year old white female with no known health issues.  I had an ultrasound of this area in past 2 years and the results were negative.  I have had a mammogram each year since 35 and am due for another now but all results have been negative thus far.  The lump seems to get bigger each time I have my period and more sensitive but eventually gets smaller again and the pain subsides.  Should I worry?
Hi. Thanks for your query. Painful lump in the armpit is hormonally monitored, most probably a fibroadenomas or a rare endometriosis. Get an Ultrasonography, FNAC and if required Excision biopsy for 2 reasons:1. You get rid of the disease2. You get a confirmed report and calm, stress-free life. Get the surgery done as the best option