Expert answer:
Not, breast stroke does not cause cancer.
The bumps that occur in the breast can cause pain, discomfort in the place and take a few days for complete healing. The injury caused by the blow can generate an area of fibrosis (tissue hardening) in the fatty tissue of the breast. This fibrosis, depending on the intensity and location of the blow, can be perceived as a small lump. However, this fibrous lump it's not evil and does not cause problems for the woman.
It is advisable to perform breast self-examination frequently and, after 49 years, to begin mammographic follow-up.
At the moment of the blow, the woman can apply cold compress to relieve the formed hematoma and reduce local pain.
