Sore gums can have many potential causes, such as gum disease, vigorous brushing, or hormonal changes. They can also be a sign of COVID-19 infection, although this is not a common symptom. Sore gums ...

Canker sores are bacterial, non-contagious infections that occur on the gums, inner lips, inside the cheeks and sometimes on the tongue. They are usually red and round with a white center. Most canker ...