Photoaging


Sunburn is the least of the problems caused by prolonged exposure to sunlight. Despite intense burning, blisters and fever in severe cases. The real danger is photoaging and Photocarsinogenesis, which is nothing more than the precursor disease of skin cancer.

Ultraviolet light has two different wavelengths, the long wave ultraviolet (UVA) and the short wave ultraviolet (UVB). UVA rays penetrate deep into the dermis, the thickest layer of the skin. UVB rays will usually causes sunburns in the surface layers of your skin. It plays a key role in the development of skin cancer

The effects of sunburn are usually temporary, and the severity of the effects depends directly on the degree of exposure, the intensity of the radiation and your skin type. The most common effects are redness, burning and blistering of the skin. In more severe cases, fever may appear.

The really dangerous thing about sun over exposure.

Cutaneos signs of significant Photoaging
Cutaneos signs of significant Photoaging

The long term exposure to the sun or ultraviolet radiation sources are the first causes of photoaging and photocarsinogenesis.
In the case of photocarsinogenesis, exposure to ultraviolet light has two harmful effects on health. Not only does it cause the alteration of DNA, which leads to the mutation of cells, transforming them into malignant and carcinogenic cells, also has immunosuppressive properties, which facilitates the appearance of tumors in the skin, because the immune system loses its ability to recognize and eliminate malignant cells, oncogenic viruses, which facilitates the formation of skin cancer.

Photoaging
Unilateral Photoaging. After 15 years of unilateral exposure through the glass of the windows

Photoaging, unlike photocarsinogenesis, has an inflammatory response to ultraviolet light, one of its main effects being the appearance of wrinkles, caused by the loss of collagen fibers and the abnormal and degenerative depocision of elastotic material within the dermis. (actinic elastotica).
The photoaging process is not autoreversible once exposure to ultraviolet light ceases. This is due to cell mutation causing a variation of cellular functions.

Due to the high penetration of ultraviolet rays, threfore photocarcinogenesis and photoagin may appear long time after exposure.

Diseases caused by prolonged exposure to ultraviolet light.

  • Actinic Lentigos.
  • Keratosis actinica.
  • Basal cell carcinoma.
  • Elastosis solari.
  • Actinic dermatitis.
  • Melanoma.

As a result of the above, it is necessary to  avoid prolonged exposure. most of all to sunlight, but also ultraviolet radiation sources such as tanning beds and ultraviolet light in medical treatments where the doctor and the patient should go the veneficio cost of said therapy.

 

Summary
Photoaging
Article Name
Photoaging
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Publisher Name
Dermatologist Online
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