I just noticed a small bump on both of my nipples and also in my right armpit.  I can just make out the small bumps but more noticeable is the sore feeling associated with each bump -  I should mention that I am male.  The symptoms began today.  The pain is akin to a large pimple.
HI, Dear,Good Evening from INDIA, and Thanks for your query to Chat Doctor. I studied your query in-depth and understood your health concerns. Cause of the small sore lump on nipples and in armpit-Though your age is not mentioned in your query, from the facts given in the query, its my opinion that, In your case it -is -mostly -pubertal gyanaecomastia-as its noticed today and it's sore to touch or Acne of the nipple or could be Boil with low infection as the armpit sore lymph nodes, are present. This would help you to resolve your issue. Welcome for any further query in this regard. Wishing you earlier recovery. Good Day. With Regards Chat Doctor. N.