What can i do if my breast hurt when running, jumping, or pressed; is it normal?

Maybe: If your breasts are somewhat pendulous, then this type of activity can hurt. Also depending on where you're at in your cycle may hurt as well. Make sure you have a supportive bra as that can definitely help. Some women even wear 2 bras if breasts are heavy, when they work out. If pain is localized in one spot, be sure to see a doctor. Sometimes caffeine can cause as well.