I was diagnosed with mono a few weeks ago, albeit a fairly mild case. I have nursed my toddler throughout the whole episode. Neither my doctor, nor a breast specialist (whom I saw for something else) said it was a problem. My research, as well as what the doctor said, is that there isn't any treatment. I had a bad case in high school, and that was the case then also. Melissa Kirsch, J.D., LLLL