Why do i always have mouthsores, but the rest of my family never get them?

That's you.: Mouth sores usually occur in people who already have the virus in their bodies. They more times than not have a reason to appear. Lifestyle plays a big roll. Things like stress, tensions, pressures fatigue all contribute. If you are a calm person, get plenty of sleep and don't have a life, you may escape mouth sores. There are other reasons or types of sores that occur orally. Earl.

Your unique biology: Every individual has different sensitivities and resistances to any disease. Think of a classroom. During "cold" season some students catch many colds, some catch mild colds, some never seem to catch any colds.