Factors that affect our skin

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Body skin is the same as our face skin. Both the skin on the body and the skin on the face serve the same function. The skin provides protection from mechanical impacts and pressure, variations in temperature, micro-organisms, radiation, and chemicals. The skin regulates several aspects of physiology, including body temperature via sweat and hair, and changes in peripheral circulation and fluid balance via sweat. Since the skin is so important, we’d better know how to treat our skin and what factors will affect our skin.

There are several factors that affect our skin, like pH, skin tone, environment, Weather and Humidity, Sun Exposure, and so on.

pH is a measurement used to specify the acidity or basicity of a substance. The range of pH is 0-14, the substance with a pH less than 7 are acidic and the substance with a pH greater than 7 are basic. so 7 is “neutral”. The skin’s normal pH will range from 4.5 to 5.5, If the pH is lower than 4.5 to 5.5, such as 4.0 to 3.5, that’s what we might see are signs and symptoms of dry skin and itching or flaking or peeling.

The sun’s rays can cause dark spots, skin tone determines whether your skin is susceptible to the sun's rays. Those people with lighter skin tones are to melanoma/skin cancer: White skin is around 70 percent more likely to get melanoma than Black skin. Skin tone is determined by how much melanin is produced in the skin. The more melanin, the darker the skin tone. That’s the consequential difference between skin tone and skin health. That’s why dermatologists recommend everyone apply suncream or sunscreen in summer, no matter what skin tone they are.

Skin changes constantly in response to changes in the external environment and in the body itself. The weather where you live may be the reason why the skin might become oily, sun-damaged, or dry. Environmental factors that affect the skin also include pollution in the air and even your indoor environment. For example, if you work in a boiler room, where the climate is drier, the water that keeps your skin hydrated on the surface evaporates more quickly, and you will experience dry skin.

Humid climates help skin retain moisture, but this humidity sometimes can be very high, and your skin is prone to oil so it looks shinier. People who live in humid climates may not apply moisturizer to themselves as much as people who live in colder, drier places. It’s easy to understand why some people don't use body lotion in the summer, unlike in winter, we have a lot of humidity that adds water to the skin.

Ultraviolet rays in sunlight are the most important factor causing skin photoaging. Ultraviolet rays are divided into UVA ( wavelength: 320 to 400 nm), UVB ( wavelength 275 to 320 nm), and UVC (wavelength 200 to 275 nm). The longer the wavelength, the stronger the penetrating ability. Short-wave UVC, before reaching the ground, is absorbed by the ozone layer, so its effect on the skin is negligible. UVA is the main cause to the dark skin. UVB is the ultraviolet ray that causes skin sunburn and acts on the epidermis of the skin, which can cause immediate damage to the skin, manifesting as erythema, blistering, and even causing pigmentation and skin roughness. So you may understand why we should use SPF 30+ products in summer, especially at midday and afternoon.