Katrina, this could be from radiation after effects where the radiation can cause a "ridge" in the breast tissue. I've had problems with that because the ridge pushes on nerves which can cause numbness. It also caused axial webbing for me about three times now. Can your oncologist or regular doctor refer you to a trained physical therapist that handles breast cancer patients? That helped me considerably. It was also my PT who suggested a "swell spot" which helps break up the trapped lymphs. Here is a site so you can see what they look like: https://www.lymphedemaproducts.com/products/breast-swell-spot.html However, if you see a PT, he/she can refer you to be fitted. I wear mine under my compression bra. When I had the major problems with the axial webbing (cording), I wore it consistently for 2 weeks and after that I don't need to wear it daily.