A few days before I get my menstruations. This is when I tend to catch a cold, or get an infection surrounding a tooth. In general every month my whole mouth feels really sensitive and not has healthy as usual. It does not happen every month. But I would say 85% of the time when I do get sick its right before menstruating. Can someone explain what I can do to prevent my immune system from going down during this time. Is there some kind of disorder for women and menstruation and immune system?