Why do limes fizz in beer

The link between sunburns and skin cancer may also worry people, but no one has shown any specific tie between this kind of dermatitis and cancer, Flugman said.

At his two-dermatologist practice in Long Island, New York, he sees two or three cases per year -- other cases probably go away before people get to a dermatologist. Making more people aware of it, he said, will reassure them that the reaction will probably go away, or let them avoid it in the first place.

Beer foam is a noted fun-killer. Few things ruin the enjoyment of a cold one more than having your hands and clothes drenched in your drink. But now, Belgian food scientists have found a way to prevent this party-foul: with magnets! So what causes a freshly opened, unshaken beer bottle to overflow? The main culprit is a protein called hydrophobin which dwells within the drink. Hydrophobins are created by a fungus that infects malt grains during the brewing process, attracting carbon-dioxide molecules within the beverage to the surface.

Too many carbon-dioxide molecules at the beer's neck can cause the bottle to bubble over when it's opened, much to breweries' chagrin. Coronas and lime slices are about as common on the beach as rainbow umbrellas, but proceed with caution.

Just because everyone else is doing it, doesn't mean you should too. Phytophotodermatitis is intensified by heat, sweating, and wet skin, which means a day in the sand puts you at greater risk for a severe burn. Protect yourself by applying sunscreen before sun exposure, washing your hands after dealing with limes, or ditching the lime-topped beer altogether.

Prevention methods aside, you may still find yourself sporting a painful lime burn this summer. What then? Mild redness and swelling can be treated at home with hydrocortisone cream a couple of times a day, but more severe reactions with lots of blistering may require a trip to the doctors for a cream that's prescription strength.

Note that a case of phytophotodermatitis can progress from mild to severe over its course, so keep an eye on your symptoms. In addition to skipping the lime if you're on the beach, you may also want to opt for a Corona Light. With only 99 calories and 5 grams of carbs in a ounce bottle, this light option is much better than a Corona Extra of the same size, which has calories and 14 grams of carbs.

If Corona isn't your jam, here are 12 other light beers to consider.