My friend woke up 4 nights ago with her tongue swollen. Then two days ago her upper lip swelled to 3 times its normal size. Both of the episodes occurred while she was at home and the swelling started on the right side of her tongue and her lip and spread to the entire thing. Today the inside of the ride side of her mouth began to swell and it's continuing to do so. What could cause this. She's eliminated changes in diet, deodorant, shampoo, detergent, etc,........