Treatment

Treatment is the same for both types of contact dermatitis.

The steps involved during treatment are:

• Avoid or lessen the exposure to the substance that is causing the rash.
• Treat the rash, often using antihistamine pills, moisturizer, and a corticosteroid cream.
• Severe reactions may require stronger medications, such as prednisone.
• Wet dressings and oatmeal baths can help soothe symptoms until the rash clears.

By avoiding what caused the rash, most people can avoid flare-ups.

If you work with substances that caused the rash, you can still avoid a rash. Your dermatologist can recommend ways to work and products to use. More than 80% of people diagnosed with occupational dermatitis successfully manage the condition and recover without any problems.

*Source:

What is contact dermatitis?

Contact dermatitis is a condition in which the skin becomes red, sore, or inflamed after direct contact with a substance. There are two types of contact dermatitis: irritant or allergic.

What is a patch test?

Patch testing is a diagnostic test that may determine which allergen is causing the skin to become irritated.

What is occupational dermatitis?

Occupational dermatitis is a skin disorder caused by coming into contact with certain substances in the workplace. It is therefore termed contact dermatitis. Contact dermatitis is the most common work related disease in Ireland. It can have long term consequences for workers health and in extreme cases it can hinder their ability to continue working. Research has indicated that 10 years after the condition first occurs, up to 50% of affected workers will still have some skin problems.

It has financial implications in terms of ongoing medical treatment, absence from work, social welfare compensation and possible civil claims. It brings other costs in terms of pain and suffering to affected workers. In many instances it may be totally preventable by simple inexpensive measures.

How many types of dermatitis are there?

There are 2 forms of contact dermatitis, irritant and allergic.

What is contact irritant dermatitis?

In contact irritant dermatitis the substance that damages the skin is known as the irritant. A highly irritant substance is known as a corrosive. Irritant dermatitis makes up about 80% of contact dermatitis. The other 20% is allergic.

There are several ways that skin damage can be caused:

• Detergents, soaps such as in repeated hand washing or the use of solvents can remove the protective oily layer and so leave the skin exposed to damage.
• Physical damage such as friction, minor cuts for example from fibre glass and grazes can breakdown the protective layer and allow substances access.
• Chemical such as acids or alkalis can burn the layer.

Irritation is analogous to a chemical burn. It acts by eroding or burning the outer protective layers of the skin. Irritant contact dermatitis usually occurs only on the parts of the body in direct contact with the irritant substance e.g. hands, forearms, face.

Common irritants are wet work, cutting oils, solvents and degreasing agents which remove the skins outer oily barrier layer and allow easy penetration of hazardous substances, alkalis and acids (see Table 1). Wet cement coming into contact with exposed feet and hands is a particular example of a skin irritant.

What is allergic contact dermatitis?

In this case, the substance causes the worker to become sensitized or to develop an allergic reaction some time after initial contact. The type of allergic mechanism is known as Type IV or delayed hypersensitivity. People do not become allergic to a substance immediately at first contact. The sensitization period( the time between contact and the development of an allergy) can vary from a number of days to months or even years. The risk of becoming allergic depends on several factors:

• The nature of the substance. Substance with a higher likelihood to cause allergy is known as a skin sensitizer.
• The nature of contact. The higher or more repeated the exposure the more likely it is for the individual to develop sensitization.
• The vulnerability of the host. Typically people with other allergies are NOT particularly more vulnerable to developing contact allergic dermatitis. Individuals with a previous history of non allergic dermatitis ARE more vulnerable. This may be because the sensitizer may more easily enter the bloodstream in those individuals.

Once the individual becomes sensitized, each time he/she comes into contact with the sensitizing substance, even in very small amounts, dermatitis will develop. This is different to irritant dermatitis which is dose related. The long term health consequences and ability to remain at work can be significant. In general the majority of an exposed occupational group do NOT become sensitized. It is an idiosyncratic or individual reaction.

Sensitization is specific to one substance or to a group of substances that are chemically similar. Once sensitized a person is likely to remain so for life. In allergic dermatitis the rash can occur in areas of the skin not in direct contact with the substance - the so called “Id” reaction.

Common sensitizers are chromate's (found in cement), nickel (cheap jewellery), epoxy resins, formaldehyde, wood dust, flour, printing plates, chemicals and adhesives.

*Source: