Help me find name of pre 1970 movie/show with people coming out of a fog with blisters.

I remember seeing the scene with town folk walking at night out of a fog outside getting changed in the fog. I saw it on TV at a house we were visiting, and think that scene was the end of the show/movie. I must have seen it early 1970s are the most recent, so It is probably a 1950s movie or so. It may have been an episode of a TV show like outer limits or twilight zone.