Dermatographism Causes

There are several suspected dermatographism causes, but in approximately half of the cases, the exact cause cannot be diagnosed. Often this condition is referred to as being idiopathic, which simply means that it is “of unknown cause.” Also, uncertain is the exact mechanism that leads to the formation of the raised skin patches or welts and other dermatographism symptoms.


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The most fundamental of all causes for dermatographism is the application of friction or pressure to the skin. This is not the underlying source of the problem, but it is what triggers the appearance of the dermatographism symptoms. It is speculated that pressure or friction on the skin causes the release of inflammatory mediators.


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Inflammatory mediators are molecules that are released by immune cells in the body during times when harmful agents invade the body.

Histamine is the primary inflammatory mediator suspected of being released from Mast cells into the skin when dermatographism occurs. However, other chemical mediators may also be involved.

A mast cell is found in connective tissue and releases substances such as histamine in response to an injury or inflammation of bodily tissues.

The result of this process is that small blood vessels in the skin begin to leak. This leads to an accumulation of fluid in the skin tissue and a wheal or welt develops in the area and in the shape of the applied pressure or friction.

The release of histamine and other mediators of inflammation may be caused by allergens or may be a result of non-allergic factors. In many cases, urticaria or dermatographism is autoimmune. In other words, the body produces antibodies against itself and this triggers the release of the histamine. The mechanism of histamine release differs depending on the urticaria or dermatographism causes.

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General Information About Dermatographism

  • dermatographism has no gender preference

  • dermatographism has no race preference

  • young adults in their 20s and 30s are most vulnerable to dermatographism

  • most people with dermatographism are in good general health



If dermatographism affects people that are generally in good health, then what can possibly be the causes of this skin condition?

The following diagram summarizes the dermatographism causes, which have been speculated as being responsible for the appearance of this skin condition.



dermatographism

The elements shown in red act on the immune system of the body and eventually alter it. This process then leads to the development of urticaria or dermatographism. A more detailed look at the dermatographism causes is provided below.



FOOD ALLERGENS

An allergy to a food is a possible urticaria or dermatographism cause. Typical foods that can lead to this skin condition are:

  • milk and cheese
  • eggs
  • shellfish and other fish
  • nuts
  • wheat and cereals
  • chicken
  • peas
  • oranges
  • synthetic and natural food additives such as nitrites, benzoates, sulphites, colourings, and artificial flavorings


ENVIRONMENTAL ALLERGENS

Certain elements in the environment are also speculated as being dermatographism causes.

  • house-dust
  • molds
  • pollen
  • change in temperature or extreme cold or heat
  • domestic contact with pet animals

In addition, not necessarily considered environmental allergens, but use of personal products such as deodorant, perfume, talcum powder, cosmetic products, and latex rubber can all be dermatographism causes as well.


A common allergen that is often overlooked is dryer sheets. Regular dryer sheets contain many chemicals that can affect your skin. Therefore, as a first step, dermatographism suffers should switch to hypoallergenic dryer sheets and unscented laundry detergents.


DRUGS

One of the suspected dermatographism causes may be a drug such as:

  • antibiotics (Penicillin)
  • anti-inflammatory drugs such as aspirin or indomethacin
  • vaccinations
  • hormonal preparations
  • oral contraceptives


INFECTIONS AND INFESTATIONS

Infections and infestations may lead to the formation of dermographism. Some examples are:

  • insect bites such as bee or wasp stings
  • frequent bacterial infections such as urinary track, heliobacter pylori, dental, and sinus
  • viral infections such as Hepatitis A, Hepatitis B, and mononucleosis
  • fungal infections (candidiasis, dermatophytosis)
  • protozoal infection (an infection caused by protozoa – single cell creatures)
  • scabies
  • parasitic infestations such as round or tape worms


SYSTEMIC ILLNESS

A systemic illness is one that affects the whole body, not just one localized area. Dermatographism or urticaria may be a sign of another internal illness. There are many such possibilities:

  • connective tissue disorders
  • systemic lupus erythematosus
  • Rheumatic fever
  • juvenile rheumatoid arthritis
  • endocrine disorders
  • hyperthyroidism
  • hypothyroidism
  • hyperparathyroidism
  • neoplastic disorders
  • lymphoma
  • leukemia
  • carcinoma (colorectal, lung, liver, ovarian)
  • necrotizing vasculitis
  • polymyositis
  • myeloma
  • Sjogren’s syndrome
  • etc.

This list is broad and therefore, an individual should not panic and assume that a more serious underlying disease is responsible for the dermatographism or urticaria symptoms. However, it is a possibility that the skin condition may be an indication of some other health problem. A physician will assess the presence of an underlying health problem by by being aware of other symptoms for the various illnesses and performing diagnostic testing where required.


STRESS

Emotional stresses can be one of the dermatographism causes. The effects can be direct or indirect and may act to make an individual more susceptible to possibly developing, aggravating or maintaining the presence of this skin condition. Basically, such stresses trigger the mechanism for histamine release.


HEREDITARY FACTORS

Dermatographism or susceptibility to this skin problem can be passed on via the genetic route. In terms of frequency, this is one of the less common dermatographism causes.


Please be sure to visit the dermatographism causes survey page and the dermatographism survey results page.



Do You Have A Question About Dermographism?

If you have a question about dermographism and would like that question answered by an actual sufferer of this skin hives condition, then please ask the question in the box below. Our resident dermatographism sufferer may not have all the answers, but he can pass along his experience in dealing with this skin problem which may help you in your battle with this skin condition.

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