I'm a 67 year old female, and have for the past three years had from time to time large red spots that seem to come and go on my face, mainly in the same place. They start off itching slightly, but soon become sensative and blister with a soreness within the day. They develope a white head and seem to stay on my face for about a week. I only get one or two blisters at a time. Can you help, thank you