When I was away last week, about an hour after I woke up my lips started to swell up for no reason. My mum who was sitting opposite was the first to notice it and said they were really swollen. They went down slowly over I guess the next few hours, but then it happened again the next day. I had forgotten about it, but they have just started to swell up again now - is there any reason they would? Seems very random. It's not after eating or drinking, or wearing any make up etc.