Breatfeeding moms:What are some causes for mildly painful twinges in ?

Probably let down. I get twinges off and on all day. Especially when I am pumping. I can't understand why when I am pumping my right side my left one aches some. But this is the least of the weird things that I have noticed about feeding. I have noticed that if I drink a gl of water a few minutes before feeding or pumping it helps with the discomfort that can sometimes take place. Good Luck