Humidity is terrible for my skin and respiratory system! I suppose it's all individual, like most things. My face and hands break out whenever it's too humid, or when the humidity sharply rises even if it's not insanely high. Everything I read says to run a *de*humidifier most of the year to keep the humidity below about 55% so that molds and dust mites won't breed so quickly. My downstairs is so much nicer since we ripped out the carpet and put in cork flooring ... by doing that alone, the humidity dropped 10 points.

It does get awfully dry indoors in the wintertime, but if my skin, sinuses or lips start getting too dry, it's because it's too cold for me to want to drink enough water.