Canker sores are small ulcers that can appear inside your mouth, on your gums, tongue, throat, or on the insides of your cheeks. When the ulcers burst, they leave behind a painful open sore or lesion. And, sometimes, people with canker sores will suffer from other symptoms, including fever, fatigue, and swollen lymph nodes. Canker sores are small ulcers that can appear inside your mouth, on your gums, tongue, throat, or on the insides of your cheeks. When the ulcers burst, they leave
Cold Sore Prevention
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