Hi
Welcome to the MedHelp forum!
Sore breasts and taste of blood can be due to rough handling of breasts and sucking too hard or there being a nick by the teeth. This cause should be eliminated first. A bloody discharge can be due to papilloma or fibrocystic breast. Fibrocystic breast along with tenderness can cause serous clear discharge too. At times the discharge is due to cancer. You need to undergo a few tests to know why this is happening. Please consult your PCPor gynecologist immediately. Please let me know if there is any thing else and do keep me posted. Take care!
Go to a doctor right away and get checked! Do not wait!