I am not medically trained but the little I know I will share because what is most important in the fight against breast cancer is early detection. While it is imperative that you go for a mammogram at least once in 6 months, you could also do a regular self-examination in the following ways:
Note that you have to be topless and braless for each of these.
1.Standing at akimbo and facing the mirror, look hard at your breasts to see if there are any lumps, swelling or if they look misshapen. Take note if there is dimpling of the skin or discrepancy in their sizes.
2.Gently squeeze each nipple as though you are pinching. Is there any discharge or fluid secretion? Did you notice a change of any sort?
3.Raise one arm then move your other hand over the breast on the side of the raised arm. Press lightly to feel for lumps. Repeat for the other breast.
4.Lie down flat on your back then put an arm under your head. Examine your breast as you did in (3) but this time with 3 of your fingers moving gently in circular motion over the breast region from the collar bone to your ribs below the breast. Use different levels of pressure, from light to medium and firm. What you are looking for is if there is any lump, knot or thickening. Do the same for the other breast.
If you notice any anomaly, please see a doctor immediately.