NORWALK - This week, News 12 Connecticut's What's Ailing You looks at sunscreen expiration dates.

Sometimes the expiration dates on sunscreen are not always clear and consumers are afraid to throw out what could be a perfectly good product.

Dermatologists say using sunscreen that has expired could be just as bad using no sunscreen at all.

If you don't see an expiration date on the bottle, Greenwich dermatologist Dr. Julia Sabetta says a good rule of thumb is to throw it away after three years. At that point, the ingredients become less effective. The same goes for sunscreen that is sitting in a hot car.

Dr. Sabetta says to apply sunscreen with an SPF over 30 on sunny days and to keep reapplying every two hours.

News 12 Connecticut wants to know, "What's Ailing You." You ask the medical question and we'll work to find you an expert's answer. Send your questions by way of Facebook or Twitter using the hashtag #WhatsAilingYou.