One of the best ways to slow the growth of the lumps and reduce size is - STOP TOUCHING THEM! No joke brethren, its known as glandular stimulation..
The more the touch the nipple,breast tissue near or around the areola you will stimulate the the ducts,and muscles..Even stimulating the muscle that resides just under the areole they will tend to contract and flatten (pushing down on the existing gyno,stimulating it)..When the muscle is relax it looks more puffy, so when you look at it; it may concern you and trigger an impulse to habitually investigate.. Avoid this at all cost!
Site stimulation is real by merely touching the area..
This has been known to happen to honor guards in the services world wide, and a most notoriously known instance was in Germany, involving numerous members of the color guard..
Because if relentless drilling/practicing, the replica riffle would always hit,slam, or graze the left side of their chest (in the general area of the nipple), this repetitively, none stop action in fact induced gyno/permanent inflammation that needed cosmetic reconstruction/correction!
The moral here: Play with a woman's boobie,not yours!