When your skin’s hungover, the lack of sleep and abundance of dehydrating cocktails cause swelling and inflammation.

Drink coffee, says dermatologist Francesca Fusco. The caffeine will help flush the fluid that’s causing your blowfish impersonation. (But you’ll need water later to rehydrate).

Next, soak a facecloth in a bowl filled with ice water and whole milk (the fat and cold calm irritation); hold it to your face.

Then erase under-eye bags with an eye gel, not cream (the astringent effect of gel tightens skin as it dries), containing cucumber or vitamin K.