Perform a breast self-examination once a month to familiarise yourself with what is normal for your body. Did You Know? - If you menstruate, the best time to check is 3 to 5 days after your period ends, when your breasts are least swollen. - If you are post-menopausal, pick a specific, easy-to-remember day (eg. the 1st of the month) to check consistently. - 80-90% of detected lumps are non-cancerous. How to Perform a Self-Examination 1. Visual Check (in front of a mirror) - S