Hello and thank you for posting.
I understand from the title of your post you are having problems with an itchy breast and tender nipple.
The best thing to do when you have new symptoms that are worrying you is to make an appointment with a GP. They can then assess you and decide if further investigation is needed.
Take care and if you want to talk things through with one of the nurses on our helpline the number to call is Freephone 0808 800 4040. The lines are open from 9 am till 5 pm, Monday to Friday.
Sarah.