Had breast reduction 20 months ago. Breasts took quite a long time to finally feel "normal" and absorb all the fluids associated with this big surgery. Had diagnostic mammogram nine months post op...everything was fine, except breasts were still very tight with fluid. I am a runner, and as soon as I started really getting back into it, my breasts finally "relaxed", but the right side under the arm still looked like there was some fluid in it, especially right after I had a run.(I hope I didn't do damage to scar tissue?) It would go down after a while, but the area wasn't as tight looking as the left. I then noticed my right axillary puffed out, and was able to feel a very oval piece of tissue that was rubbery feeling and mobile... Can't keep hold of it when I try to move my arm). Went for a diagnostic mammogram with ultrasound. Findings on mammogram and ultrasound indicated assymetric right breast tissue, all clear. Ultrasound axillary...fatty tissue/nodes...no findings. I was happy to read that the mammogram and ultrsounds were clear, but I am still worried about having these fatty tissue things floating around in my underarm. Dr said to monitor...6 mos check up What should I do...I don't like unnessary surgeries, especially in sesitive areas where vital veins/muscles and tendons are.