The tenderness sounds very typical for the fibrocystic changes. This condition very frequently leads to scares for breast cancer. The coloration change sounds less typical but not diagnostic for cancer either. You should call your PCP for an early evaluation of the breasts. This is likely to be due to the fibrocystic changes but we all have to be careful in this evaluation.
I hope this information helps. Further questions are welcome if you have others. Best Regards,
Anthony Bray MD