Parts of the Skin and Their Functions


We go through our day not really thinking about our bodies, unless there is something wrong. If we get a cold we start drinking orange juice; if we feel tired, we get more sleep; and when we see wrinkles or fine lines appearing on our faces, we head to the drug store to browse the skin care aisle and spend way too much money on a product that we’re not sure will actually work. It’s time we change up our routine and find a method of rejuvenating our skin that will work. That’s where iderma comes in. We have developed an LED light treatment masque using science that was founded by NASA and the National Institute of Health. Read more about this science in our last blog post. The more you learn, the more you will want to know about the layers of our skin and what they do. So let’s dive in!

LED Light TreatmentEpidermis

This is the top layer, including our skin, which can be incredibly thin in some parts, like our eyelids, and will be thicker in other parts, like our heels. You probably already know that this layer protects what is beneath, but what else does it do?

  • Makes New Skin Cells. This layer of our skin is about the width of a human hair and is mainly formed of dead skin cells. At the bottom of this layer is where new cells are formed. Over time, the new cells will push up and cause the dead cells to flake off. Calluses form on this layer of the skin, which is caused when friction against the skin creates thicker skin.
  • Gives Us Our Color. The epidermis layer of our skin makes melanin, which is the pigment, or coloring in our skin. While everyone has around the same number of melanin-making cells, these cells can produce different amounts of pigment. So if you have cells that produce more melanin, you will have darker skin. Melanin is also what protects you from sun damage. When we spend too much time in the sun, we will produce more melanin, giving us darker, more tanned (or burned) skin.
  • Protects Our Body. You can thank your epidermis if you make it through the flu season without getting sick. This layer of our skin has cells that are a part of the immune system.

LED Light Treatment


The layer of your skin that is just below the epidermis, is much thicker than the epidermis, and has several different functions.

  • Makes Sweat. This layer is where you can find your sweat glands, which are small pockets that make sweat. The sweat that is produced goes through little tubes and travels up through our pores. Our body sweats to cool us cool and also to rid our body of things that could harm us.
  • Houses Nerves. When we touch things that are soft, hot, cold, or when something is itchy, the nerves in the dermis will send the signal to our brain. Not all nerves are connected to the brain, however. Some nerves are connected to our muscles and send the signal through the spinal cord.
  • Grows Hair. The roots of your hair are found in the dermis layer. The root of each hair is attached to a muscle. When you feel cold or scared, the muscle will tighten and produce goose bumps.
  • Makes Oil. Along with sweat glands, your sebaceous glands are also in the dermis layer. This is what produces oil that makes our skin smooth, soft, and waterproof. However, when the glands produce too much oil, it will cause zits or pimples to form.
  • Carries Blood. Blood vessels can be found in the dermis layer. These vessels feed your skin as well as removes harmful substances.
  • Holds Collagen. Collagen can be found throughout the body, but the fibrous protein has an important role in the skin. In the dermis, collagen helps to form a network of cells called fibroblasts, where new cells can grow. When using our LED light treatment masque, it will stimulate the growth of collagen, which improves the integrity of our skin, preventing wrinkles and lines.

LED Light Treatment

Subcutaneous or Hypodermis

The third layer of your skin is made up of fat. The red light used in our LED light treatment masque can penetrate into the hypodermis layer of your skin.

  • Connecting Layer. This fatty layer of connective tissue attaches the dermis layer to your muscles and bones. The fat also helps cushion internal organs, muscles, and bones.
  • Helps Blood Vessels and Nerve Cells. The blood vessels and nerve cells that start in the dermis layer, are bigger in the hypodermis layer, and then go to the rest of your body.
  • Controls Body Temperature. When our body is above 98° Fahrenheit, the blood vessels in this layer will expand allowing heat to escape. The opposite happens when our bodies are too cold, the vessels will trap heat inside by constricting.

What Does This Have to do With LED Light Treatment?

After reading more about how LED light treatment works, you’ll understand that the specific wavelengths of red and infrared light will stimulate the function of cells in the layers of our skin. Much like how plants absorb light from the sun to create energy, our skin will use the light to increase energy and allow the cells to rejuvenate the skin. The additional collagen in our skin will keep the surface plump and smooth.

If you want to experience youthful, rejuvenated skin, give our LED light treatment therapy a try. The easy to use masque gives new life to your skin with just three, eight-minute sessions per week. View our before and after results gallery and order an LED light treatment masque for yourself.