1 / 5Symptoms of breast cancer: Frequent changes in the skin over the breast. Nipple inversion, skin discoloration of the nipple or bone, redness over the breast, lump or thickening in the breast, change in breast size.2 / 5If you see any of these symptoms, contact your doctor. Any delay in this can put your life in danger.3 / 5How to prevent breast cancer: consume alcohol in moderation, exercise regularly, and take a good diet.4 / 5Causes of breast cancer - The main cause of breast cancer are the abnormal growth of breast cells. These cells form separate lumps more rapidly than healthy cells. cells through your breast into your lymph nodes.5 / 5The exact cause of breast cancer is not clear, but certain risk factors make it more likely. It is possible to prevent some of these risk factors. The risk of breast cancer increases with age. Genetics Women carrying certain mutations in the BRCA1 and BRCA2 genes.