Hey, you are best to go to the doctor. I'm not sure what is wrong, could be your bra rubbing your nipple the wrong way. If the nipple has a sort of crust on it, please ask to be screened for everything, including cancer. (I don't want to alarm you, it is just pre-cautionary). It might just be a rash and they might give you some cream, if it works awesome, if it doesn't don't hesitate to go back to the the doctor.
I am concerned as i am having pain on both side of my breast nipple.It is very painfull when i touch it n also when my nipple rub on something like my shirt or bra.Can you please help me know why is it happening and what should be done. I am 20 year old. Please let me know asap...I need your help vey fast...