I have a 4 month old and have been suffering from a blocked duct for 4 weeks. Last week I got a blister on my right nipple. The nipple went away but left a small open wound. Within 24 hours I had stabbing pains in my nipple. My doctor says I have a yeast infection in my breast and that is likely causing the blocked ducts. I have been on diflucan for a week and my block is getting worse. The nipple pain and breast pain have also returned. I am waiting for my doctor to call me back. Today I have another blister and I feel very discouraged. Does anyone have any experience with yeast infections and blocked ducts?