A few days ago, I noticed a small lump under my right arm (on my right armpit). It wasn't painful at that time, but when I touched it while taking a bath, it started getting painful after that. Right now there are 2 lumps, one above the other on my right armpit, about 1.7cm by 1.3 cm, oval-shaped. The top one is slightly smaller than the bottom one. They are causing me pain whenever I move my arm, lean on my right side or lift my arm.