Alright, so I recently had an infection in my right armpit that went away with antibiotics, and I recently discovered a lump in my right arm. Three days ago, the doctor said the infection was gone, but now I'm worried. Whenever I have my arm down at my side, it feels like there's something swollen. I'm only nineteen and I'm extremely worried about what that could be, considering it's location. Anyone know if maybe it's an after effect of the armpit infection?