Good afternoon Dr. Andrew, I m 23 ,male I found a lump in my left armpit on Sept.18,2016 and I went to see mu family Dr. he prescribed CEPHALEXIN 250mg for seven days, one capsule,4 times a day. I just finished the medicine but the lump I found is still there and didn t getting smaller. My question is what I am going to do for this lump for next step? Thank you