Learn the common causes of tongue swelling, effective treatments, and warning signs that require immediate medical attention ...
Medically reviewed by Edmund Khoo, DDS An unhealthy tongue may look red, smooth, or black. Other signs of tongue health ...
You may also notice bumps on the back of your tongue, sores that appear on the side, or a white coating. COVID can also sometimes cause loss of papillae, which makes your tongue look smooth.