Heel pain. You need to get medical attention and an x-ray you may have a stress fracture or even worse a true fracture.
Tylenol/ibuprofen. When running across pavement several things can happen. Step on a rock, repetitive trauma to the heel to name a couple. If the pain gets better fairly quickly then you likely just bruised it. If the pain persists you may need an xray or other imaging studies to determine what exactly is going on.