The dangers of the sun

Although summer is expected by all to enjoy the outdoors and nature, we must take into account certain care, precautions against the sun. In this sense, dermatologists are rounded to advise not direct exposure to it.

The most important cause of skin cancer, is the sun. It is also responsible for the stains actin, freckles that until some time ago, were regarded as a sign of old age betrays. For the problems of the sun, have joined in recent times, those caused by ultraviolet lamps and sunbeds. The greatest danger lies in the action of ultraviolet rays, which are considered carcinogenic, and altering the DNA of the nucleus of the epidermal cells, thus causing them to divide and multiply in improperly giving rise to tumors.

While the body has mechanisms to repair the damage caused by ultraviolet rays, they may fail, either by genetic causes or a repeated sun exposure, which multiplies the damage and difficult to repair naturally.

Of course in skin cancer, also has much to do in the same color and inheritance. The melanin (the pigment that gives color to the skin), is a natural sun screen: there are the more melanin, the lower the risk of any disease of this kind.

After years of exposure to the sun so long, the damage becomes more visible with the appearance of stains squamous lesions called keratosis.

These injuries are a precancerous. Generally occur in regions unprotected by clothing, and may become malignant and invade neighboring tissue. The carcinomas can be basal cell or thorny, the first of these, only invasion of both local and time taken can be treated successfully.

The sun also alters the immune system inactivate the functioning of the cells of Langerhans. Hence, decreasing defense mechanisms harmful substances may enter the body and prevent the white blood cells reject.

In addition to all these injuries, the sun produces other as erythema or reddening of the skin, red spots, which are caused by dilation of capillaries, photoallergy, which is evidenced by erythema or watery blisters content.

For all this, the sunscreen is essential and depends on the type of skin that everyone has.