Fototóxia

It is the increased absorption of sunlight by making contact or drugs or chemicals, or sometimes by alterations in the metabolism of persons or in certain diseases. The injuries that occur are the same as sun exposure produces only more intense and appear less exposure time.

1. Fototoxia induced by drugs.

It is a cutaneous adverse reaction due to systemic or topical exposure of a drug and light. The chemicals may be responsible, in addition to drugs, cosmetics and industrial products. The reaction can occur in any individual, is required and dose-dependent, and essentially it is an exaggerated sunburn. It is more common than photoallergic reactions and may also occur at any age and any skin type. Eczematous reaction is not seen in phototoxic reactions. Reactions by the Sun

The drugs involved are:

nalidixic acid, amiodarone, captopril, chlorothiazide, etretinate, phenothiazines (chlorpromazine, promethazine, thioridazine, etc..), furosemide, griseofulvin, naproxen, pyrazinamide, piroxicam, psoralens or furocoumarins, sulfonamides, tetracyclines (especially doxycycline and dimetilclortetraciclina), and derivatives tar.

By eliminating the offending drug, the lesions subside.

2. Drug-induced photosensitivity.

The drug present in the skin absorbs light (especially UV) and forms a photoproduct that binds to proteins to form a complete antigen, which causes the allergic reaction. The lesions of eczema, itchy blisters and oozing deaparición in areas exposed to sunlight, even if exposure persists extieden throughout the body. Photoallergy may persist for months or years despite the absence of contact with the substance responsible.
* Causing general administration:
or Phenothiazines
or Sulfonamides
or group

* The administration of topical:
* halogenated Salicylanilides (deodorants and soaps)
* PABA and derivatives (sunscreens)
* Cinnamates and benzophenones (sunscreens)
* Benzocaine
* neomycin
* Musk Perfume
* thiourea present in the neoprene

For diagnostic tests are used and fotopatch patch test, which is the reproduction of the application, a small portion of the product suspect in the skin for 24 hours and exposure to a UVA lamp to different spectra to reproduce the lesion of eczema.

Allergy Photosensitive by plants (Phytophotodermatitis)

It is a contact dermatitis caused by plants and exposure to sunlight. There is a phototoxic or photoallergic reaction, caused by photosensitizing substances (furocoumarins), present in various plants.

* Plants producing phytophotodermatitis
or Rutaceae: Lima, orange, bitter orange, lemon, bergamot, common rue.
or Umbelliferae: parsley, chervil, celery, parsnips, fennel, dill, carrots,
or Compositae: Yarrow, Yarrow and Chamomile
or Cruciferae: Mustard
or Moraceae: Higueras (only leaf and stem)
or Ranunculaceae: Buttercup
or Rosaceae: Agrimonia
or Legumes: Peas
or hyperactive: St. John’s Wort

It can occur at any age and race. The professions most affected include gardening, horticulture, floriculture, agriculture, etc. It is more common in summer. In the acute phase appears erythema, vesicles and blisters with itching, but no eczema.

There may be a residual pigmentation artificial shapes (lines, etc., Depending on some outside work). The lesions were distributed in areas of contact, especially in the arms and legs. The acute eruption spontaneously yields, but hyperpigmentation may persist for weeks.

They are a combination of the effects of gravity and motion. Wrinkles are because the skin makes certain forms as neck wrinkles form because we are constantly lowering and raising the head and gravity also pulls the tissues, is an inevitable move.

These lines are difficult to correct with procedures such as plastic surgery, fillers or paralytic agents, to delay its appearance is to keep the skin moist and protect from the sun.

Wrinkles

If the skin has good amounts of elastin and collagen (tissues that remains firm and fresh) offers resistance to the formation of wrinkles. Collagen is affected by exposure to the sun, our diet and lifestyle (stress, sleep, etc..) Skin care and our genes.

Wrinkles are not the end of the beauty we can live with them and if we want to minimize, prevent and correct we have many ways to do it. The best action is to avoid taking care of our skin and following a healthy lifestyle.

Types of wrinkles

Dermatologists have several classifications between these: its depth, its origin and in their order of appearance. This is one of the major classifications for the causes of wrinkles:

Gravitational wrinkles

These wrinkles are caused by gravity. The force that keeps us on the floor and keeps the earth revolving around the sun on our skin also acts gently pulling downward.

Our genes and skin type determine the resistance that our skin has to oppose the force of gravity. These lines are: the marionette lines (from the mouth down). These lines are considered easy to correct with procedures like plastic surgery (face lift), fillers or paralytic agents.

Dynamic Wrinkles

These wrinkles are caused by the movement of the muscles in the face. Every time you face to smile puckered by the sun, stress and so on. we are creating patterns that can be converted into lines and wrinkles.

The repetitive movement is slowly making a mark visible on the skin. They become more noticeable by the loss of elastin and collagen in the skin. These are the wrinkles on the forehead.