Gum recession. It's not a decline in sales across the country for chewing gum. Nope. We're talking about your gumline slowly diminishing from your teeth, making them appear longer and thus, exposing your roots — a significant sign of gum disease. Receding gums, or gingival recession, can be caused by various factors, some you can control, and others are out of your hands. Receding gums cannot grow back. However, your dentist or periodontist can help you treat and prevent it from getting worse — which is something to smile about!