My wife wakes up sweating at night, she has had no known health problem prior to this. She complains that as soon as she goes to bed it feels as though someone is touching her on the forehead and side of cheeks. The feeling last from 10 mins until 2 hours after going to sleep. It seems to have gotten worse over the past months and has started happening every week or so now (since about 3-4 months ago). I ask her if there is anything wrong and she says no, but we both know something’s not right because we’ve been married for nearly 15 years and never experienced anything like this before. What could be causing this?