What our European earwigs are known for, however, is invading homes in large numbers, at certain times of the year. Earwigs come in cycles, some years are worse than others. Wet springs virtually guarantee high numbers of earwigs. When the population gets so high on the outside, you're bound to get some of the overflow. Not many people believe this anymore, it's pure superstition.
Earwigs are harmless to humans.
After all, they do use it for defense, so you might expect something like this if you handle them with your bare skin. Anyway, this is not something you have to worry about. Only uncomfortable, at the worst. Neither are they dirty or vectors or carriers of any disease. They won't lay eggs or reproduce inside your house or furniture.