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Rates of the two most common skin cancers have more than doubled over the past decade. Here's how to protect yourself.

When it comes to skin cancer, there's good news and bad news. First, the bad news. A report published in the June 2017 Mayo Clinic Proceedings found that cases of basal cell carcinoma (BCC) and squamous cell carcinoma (SCC) skin cancers have risen 263% and 145%, respectively, over the past decade.

The good news? BCC and SCC are rarely life-threatening and they're usually easy to treat if they're caught early. Plus, there are simple ways to prevent them.

Ask the doctors

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Q. I was recently diagnosed with eczema. Is this condition treatable without the use of steroids? I'd like to avoid using them if I can.

A. Eczema, also known as atopic dermatitis, is a chronic inflammatory skin condition. Some people with eczema have mild dryness or itchiness, while others experience more severe symptoms, such a scaly rash or skin that cracks and oozes. Eczema is more common in childhood, affecting up to 20% of children, but it also affects adults. The good news is it's not contagious, and in some cases, it's possible to manage the condition without using steroids.

Dermatologists tell us what ingredients to look for in a skin serum to treat a variety of skin conditions.

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As you get older, you might start to look a little more intently at the rows of lotions and potions at the drugstore and the beauty counter. You may wonder which ones can really help your skin look more like it used to � minus the wrinkles, dark spots, and other signs of aging.

One word that's showing up on labels a lot these days is "serum" � typically on products that promise to brighten and smooth your skin and help roll back the clock. These little glass bottles contain a host of impressive-sounding ingredients such as hyaluronic acid, niacinamide, and L-ascorbic acid. But do they really work?

The right combination of components is essential to get the results you hope to see.

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Serums can be used to treat a wide range of conditions, including brown spots, wrinkles, and dry or acne-prone skin. Below are the ingredients that Harvard dermatologists Dr. Abigail Waldman and Dr. Maryam M. Asgari recommend for various skin conditions.

Problem: Dry or sagging skin

If your skin is dry, tight, and flaky, look for serums that contain vitamin E, niacinamide, and glycolic acid. Also look for ceramides, which are fatty molecules that help hold the skin together and keep moisture from escaping. Other good options are serums that contain hyaluronic acid, or those with collagen peptides, epidermal growth factors, or stem cells.

A good moisturizer is one of the foundations of an effective skin care regimen for dry, older skin. Moisturizers can soothe dry skin and make wrinkles less noticeable, even though the effect is temporary. But with so many to choose from, how do you decide?

Petroleum jelly is one of the most effective moisturizers, especially when used right after bathing to seal in moisture. It is also one of the least expensive. But many people dislike using it on their faces because it looks and feels greasy. Instead, creams and lotions that contain some water are a better choice for a facial moisturizer. Many of these creams and lotions are humectants, an oil-free class of moisturizer that binds water to skin, so the smoothing, softening effects may last longer.