Lips dry out at night because all the moisture evaporates off your delicate lip skin. Drinking water doesn’t help. It’s a like a dolphin drying out when he’s out of water — giving him water to drink won’t help. Applying a barrier to prevent water from evaporating will help.
- Use petroleum jelly (Vaseline, Aquaphor) or any lip balm that you like. Keep it at your bedside. Apply whenever you wake up.
- Use a room humidifier and avoid antihistamine sleeping medications such as diphenhydramine.
- Sleep with your mouth closed (not so easy, though).
Photo: Leo Reynolds, Flickr CC