Sun and skin

It is obvious that the sun is necessary for life, as it has a beneficial effect in many aspects, such as heat, light and circadian biorhythms, neuroendocrine physiological phenomena, mental disorders, seasonal behavior, the formation of provitamin D , chlorophyll photosynthesis in plants. and others, which we cannot do without, for the treatment of certain skin conditions. But all this does not indicate that such radiation can be used inappropriately for the sole purpose of being brown. In this article we want to reveal the most important harmful effects of the sun on our skin.techbizcenter.

The sun's energy is made up of different radiations: on the one hand, they are ultraviolet (UV) rays, which are divided into UVB and UVA. UV-B rays affect the first layer of the skin (epidermis) and are mainly responsible for sunburn, sunburn and skin cancer; while UVA rays act more deeply, penetrate the dermis and are of increasing importance as chronic exposure leads to degeneration of collagen fibers, interacts more easily with local and systemic chemicals, which is associated with reactions of photosensitivity, and more and more studies confirm that this increases the risk of UVB for melanoma and non-melanoma skin cancer.technologywebdesign.

As a result of this continuous and dynamic interaction between UV radiation and the skin, a set of effects is created that can be divided into two large groups: normal, that is, expected of all of us, for the population exposed to UV radiation, and abnormal, when there is individual pathology. answerhop ... computersmarketing

Short term effects

Erythema: This is mainly due to UV-B radiation. Individual susceptibility to solar flare was used to classify skin phototypes (table). In addition, you can find more helpful resources at popbom These categories of individual susceptibility to short-term effects are also correlated with individual susceptibility to long-term effects after exposure to sunlight. In general, people with increased and acute sensitivity to the sun are also at increased risk of developing skin cancer due to chronic exposure to ultraviolet light.

Sunburn: Excessive sun exposure, even in isolation, causes suntan. This usually begins inside a few hours of exposure and peaks within 24 to 36 hours. Its intensity will depend on the time and circumstances of exposure, but, above all, on the degree of previous skin pigmentation and, therefore, on its type. Therefore, depending on the phototype of each person, it is necessary to choose the right sunscreen.marketingmediaweb.

PHOTOTYPE OF SKIN

Phototype 1: Always bright and never tan. hollyhealthfitness

Albinos (use extreme photographic protection)

Phototype 2: Always on, although it may tan slightly. Nordic (uses high defense)

Phototype 3: Sometimes it burns, sometimes it tans.

Most of the population of Spain. (use medium defense)

Phototype 4: Never lit and always tanned.

Dark complexion (use minimal protection)

Phototype 5: Black race, photographic protection is not needed.tipsfromcomputertechs.

Tan: UV-B light has a pronounced pigment effect; the effect begins to manifest itself three or four days after the first exposure, and if it is isolated, it reaches its peak after about 15 days and then fades very slowly; while UVA light causes a more temporary pigmentation. With repeated exposure, the pigment effect builds up, making the skin more resistant to the sun. In addition, you can find more helpful resources at tockhop  In people with brown skin, the pigmentation obtained over several weeks of repeated exposure slowly diminishes over several months, while in people with phototypes 1 and 2, the pigmentation effect will always be unreliable. webtechgalaxy

Long-term effects

Photoaging: Repeated exposure to the sun remains one of the main causes of skin aging and is responsible for many undesirable aesthetic consequences. At the age of 30-35 years, signs of photoaging begin to appear: the skin changes its texture (thickening, fragility and wrinkles of the skin); vascular changes occur (diffuse erythema, bruising due to minor trauma, telangiectasias on the cheeks, nose and ears, and venous lakes on the lips) and pigmentation changes (freckles, lentigo, teardrop hypomelanosis of the hands and feet, irregular pigmentation neck and chest), together with an increase in the size of the nevi in ​​the photo-exposed areas and the appearance of seborrheic keratoses, cysts and comedones in the cheeks and periocular region. Due to the higher permeability of UVA rays on the skin.healthbeautystudio

Photocarcinogenesis: The most active band for photocarcinogenesis is UVB, although in experimental studies UVA also acts as such. This is somewhat dose dependent, but the minimal carcinogenic dose cannot be quantified as it varies greatly with skin type and other individual factors, genetic predisposition, and immunity. Precancerous lesions associated with solar radiation include actinic keratoses and tumors, basal and squamous cell carcinomas, and malignant melanoma.digitalmarketingtrick.