When i touch my nipple i feel something hard and round. is it likely to be cancer?

It's possible.: While i would like to be more helpful, it's simply too difficult to draw too many conclusions from your question. Any new breast lump should be evaluated by a physician, sometimes requiring other tests such as a mammogram, ultrasound, and/or a biopsy, before reaching a definitive diagnosis. I urge you to make an appointment with your primary care physician or gynecologist.