i too began taking red clover, 3x a day (is that too much unsure how much to take just winging it lol) and after a few days i noticed the ring came back...
i take SP-8X, RC-3X and Flaxseed Oil- 2X
noticed the white ring yesterday at work after i felt like my inner arm was hitting boob more then usual, went to restroom lifted up shirt and saw my nipples were shiny in appearance and had about a 1/2 in wide white circle around them, wonder what it means, no aches in chest for me yet but i hope they grow ouward and underneath some