Cold sores are contagious. They are fluid-filled blisters and they ... Canker sores are yellowing sores that appear in your mouth or along your gums. They are not contagious and usually heal on their ...

Luong, DMDFact checked by Nick Blackmer Using a saltwater rinse can help heal gums and improve oral health ... Soothe oral ulcers or mouth sores Reduce dental plaque and microbial count Reduce ...