Cold sores are a lesion that can appear on and around the mouth ... but the following home remedies may help you relieve and heal them sooner. What causes cold sores? The Herpes simplex virus ...

Infections: Viral infections like herpes simplex can cause similar lesions. - Allergic Reactions: Toothpaste or mouthwash containing sodium lauryl sulfate may trigger ulcers. Types of Mouth Ulcers ...

Blood blisters in the mouth usually result from accidental injury. Most respond to home treatment, such as a saltwater gargle, oil pulling with coconut oil, or over-the-counter (OTC) medication.