The skin is the largest organ of the body and is ever-changing. It exists to protect us from the harshness of the surrounding environment, help regulate body temperature, gather sensory information, and also plays an important role in the body’s immune function.
A Look Through the Microscope
The skin consists of three layers: the subcutaneous tissue, the dermis, and the epidermis.The subcutaneous tissue is the innermost and deepest layer of the skin. It consists of fat, blood vessels, connective tissue, and nerves. It serves to store energy, provide insulation, and protect what lies underneath from injury, acting as a sort of shock absorber. Its thickness varies depending on location, being thickest on the buttocks, and thinnest on the palms of the hands and soles of the feet.
The dermis is the middle layer of the skin and sits atop the subcutaneous tissue. It contains smaller blood vessels and nerve endings, sweat and oil glands, hair follicles, and two types of corpuscles that act to transmit the sensations of touch and pressure to the brain. The dermis is made up of three different types of tissue, one of which is collagen, and its thickness also varies by location.
The outermost layer of the skin is the epidermis, which consists of five layers of stacked cells. New cells are created on the bottom layer, and are gradually pushed upward toward the surface until they finally reach the outermost layer, where dead skin cells then slough off. The cycle of producing new cells and shedding dead cells takes approximately a month to complete. Millions of dead skin cells are shed every day, adding up to a total loss of approximately 1 to 1.5 pounds of dead skin each year.
The epidermis contains strengthening proteins, called keratinocytes, as well as three types of specialized cells: melanocytes, which produce melanin, or the skin’s pigment, Langerhans cells, which act as the skin’s first line of immune defense, and Merkel cells, whose function is not yet well understood. The thickness of the epidermis also varies, ranging from 0.5 millimeters on the eyelids to 1.5 millimeters on the palms of the hands and soles of the feet.
It’s the epidermis that takes the most abuse, and the layer that can become dry (a condition known as xerosis), itchy, and cracked—all due to a loss of water.
Moisturize
Moisturizing means adding water to the skin and locking it in.Moisturizing should be a daily part of your skincare routine. To help seal in moisture, the best way to apply a moisturizer is to rub it liberally into damp skin following a shower or bath. Over-the-counter ingredients often have a lot of ingredients in them, including alcohol and fragrances, some of which may irritate or dry out the skin.
Humidify
Not only can the dry air outside lead to dry skin, but so can the dry heat inside. Artificial heat and air condition both make the air extremely dry, and when alternated with dry outdoor air, the skin can be stripped of its natural oils.Be Gentle
Since they’re formulated to remove oil, many soaps can actually pull moisture from the skin. It’s a good idea to use facial cleansers and body washes that are either unscented or for sensitive skin, and to avoid deodorant soaps and products with alcohol and perfumes. In addition, using laundry detergents and fabric softeners that are free of perfumes and dyes can help prevent and improve dry skin.It’s also important to avoid scrub brushes, and to be gentle when using washcloths or sponges; otherwise you may damage your already at-risk skin. For the same reason, it’s a good idea to pat-dry your skin rather than rub. This also allows the skin to remain damp, which is ideal for applying moisturizer.
You may also want to be mindful of the clothes you wear in colder months. While cozying up in a wool sweater or coat may keep you warm, wool can irritate some people’s skin, especially those with dry skin. If this is you, be sure to wear a soft cotton shirt underneath, or consider opting for a cotton sweater instead.
Develop Skin-Friendly Bathing Habits
Be warned that long, hot showers actually contribute to dry skin. According to the American Academy of Dermatology, it’s best to take a warm shower or bath, and to generally limit the time to no more than 10 minutes; otherwise, the skin’s oily layer may be stripped away, causing it to lose moisture. Following the tips above while in and out of the shower also helps.Another way to help moisturize and relieve dry skin is to add one cup of plain oatmeal in a tub of warm water and soak for about 15 minutes once a week. Oatmeal has a high protein content and can leave a protective layer on the skin to help lock in moisture. Oatmeal is also great for soothing eczema.
By employing some of these simple tips, you can keep your skin healthy, hydrated, and ready for the warmer weather to come.