A friend's question about signs of BC

[Catherine]

A friend who is about 86 and healthy wonders if she has signs of possible breast cancer. Her breasts feel like little needles are at times stabbing her. 4 or 5 inches under her one arm, she gets a similar feeling and a lot of discomfort. She has a mammogram scheduled, but is kind of worried in between now and then. No previous problems or cancers. Any ideas?

Thank you, Catherine