Any serious variety of the injuries that have been listed above may require emergency care. When any injury becomes life-threatening or arduous to manage on your own, it’s better to err on the side of caution and head to the ER.   For example, if you’re having a severe asthma attack or you have a wound that won’t stop bleeding, it would be better to go to the hospital emergency room.   If you experience chest pain, a head injury or fainting, shortness of breath, or vision changes, call 911 or visit the nearest ER.