5. Horizontal lines

Where: Along your forehead. Naturally these lines can be caused by over-use of the muscles, but often they can be exaggerated simply because your skin is dehydrated from the air-conditioning at work.

Message it sends out: You’re worried about something.

Try: Hydrating serums, like Decléor Aromessence Néroli Essential Serum, $113; and Dermalogica Skin Hydrating booster, $99.