Irritated a nerve around breast using crutches?

The proper way to use crutches is to place your weight on your hands, not under your arms. Crutches should be adjusted so that when you are using them, there is space between your armpit and the top of the crutches.

If you are already using the crutches correctly yet you still have an irritated nerve you can try different crutches that wrap around your forearms, or use a walker or wheelchair.