Eczema on the lips is also known as lip dermatitis and ... It’s usually linked to an irritant, allergy, or a family history of eczema. Eczema is an allergic reaction. It is not contagious.

A mosquito bite may turn into a fluid-filled blister in some cases. If you also notice symptoms of infection or an allergic reaction, you should contact a doctor for advice on treatments.

A canker sore is a small mouth ulcer that can appear on ... A tingling tongue can be a symptom of burns, nerve injuries, allergic reactions, and canker sores. Sometimes, persistent tongue tingling ...

Cold sores are a lesion that can appear on and around the mouth. While they aren't dangerous, they can be uncomfortable, itchy, and unsightly. Cold sores usually resolve themselves within a few ...