Skin hypersensitivity
The cells of the immune system work in various ways in skin disease.
The rash that occurs after being stung by some insects happens within minutes of contact. It is due to the release of chemicals such as histamine by immunity cells within the skin layers. This is known as ‘immediate hypersensitivity’.

Slower acting forms of response by the immune system occur because the population of cells that react against the invading substance or organism (allergen) needs to be built up from a small number of ‘memory’ cells that recognise the allergen.

Two or three days these cells give rise to others that in turn switch on other defence mechanisms such as the release of chemicals that attract the scavenger cells of the immune system. Because of the lag between initial contact and subsequent reaction, this is called ‘delayed hypersensitivity’. The skin reactions underlying allergic contact eczema are of this type.

Common allergens

It is not known why some substances are particularly prone to causing contact allergy, but common culprits are:
nickel - a white metal often used in jewellery, belt buckles, jean studs, metal watch straps, bra fasteners. Many other metals can also cause reactions.
perfumes - Balsam of Peru is a component of fragrances that can cause contact allergy.
rubber and related chemicals - shoes, tyres and clothing.
potassium dichromate - cement, leather and matches.
hairdressing chemicals (paraphenylenediamine).
medications - lanolin, neomycin (antibiotic), fusidic acid (antibiotic), steroid creams and cetearyl alcohol (used in emollient creams).
epoxy resins - in glues used in hobbies, woodworking and glass fibre construction.
colophony - resin from spruce trees, used in sticking plaster adhesive.
plants - both by direct contact and by contact with airborne particles.
In the food industry a wide variety of foods are known to potentially cause skin reactions.

These include:
sugar
flour/dough
citrus fruits and their peel
other fruits and vegetables
spices, herbs, seasonings (eg horseradish, mustard, garlic)
fish and seafoods
meat and poultry.
These are the most common of all possible allergens that can cause contact eczema.

Some of the materials known to potentially cause skin reactions are themselves components of common treatments for eczema (eg lanolin in moisturisers and hydrocortisone in steroid creams). Therefore if the condition is worsening or proving resistant to treatment, the possibility that the treatment itself is contributing to the skin problem should be stop immediately.

Actions of contact allergic eczema
Rashes first appear only at the site of skin contact with the allergen. Later it often spreads out and may involve skin well away from the contact site. This is because the immune cells become activated and migrate out through the bloodstream to other parts of the body.

When allergic contact eczema is suspected, it can therefore be important to remember where it first started when taking the medical history behind the development of a rash finding the cause.

Sometimes the cause and effect relationship is obvious, with a red scaly reaction around an earring or under a watch strap. At other times, especially if a long time has passed since the initial exposure and sensitisation, it can be impossible to identified contact allergic from other types of eczema.

It may also be difficulties distinguishing allergic contact eczema (which is an immune response) from irritant eczema (which is a direct skin reaction against an irritant substance). In practice, this difference is not so important because the same lines of treatment are required for both.

Treatment
It can be treated with Chinese Master's NEURO Acupuncture and special herbal medicine for most kind of allergy contact eczema. The lenght of treatment depends on the induvidual patients of others organ's Qi lever and the severe of the attack.

If spring brings a stuffy nose, scratchy eyes and an extra sneeze tacked on to your usual "achoo!" — you probably have hay fever (allergic rhinitis). Hay fever is the common name for an allergic response to specific substances in your environment. Hay fever is one of the most common allergic conditions, affecting about 40 million people in the United States.

If you have seasonal hay fever, tree pollen, grasses or weeds may trigger your symptoms. If you're sensitive to indoor allergens such as dust mites, cockroaches, mold or pet dander, you may have year-round symptoms.

Over-the-counter medications may be enough to manage your mild hay fever symptoms. But if your signs and symptoms are more severe — or if hay fever is a year-round nuisance — see an allergy specialist for evaluation and treatment. Without proper treatment, hay fever can impair your quality of life, cause sleeplessness, fatigue and irritability that affect your performance at work or school, and increase your risk of developing more serious allergic conditions such as asthma or eczema.

Perennial allergic rhinitis is a similar allergy that occurs all year round and is caused by things such as house dust, mites and pets. However the predominant allergen changes from time to time.

: Frequent sneezing is characteristic of hay fever.

Different microscopic substances get into the nose and cause the body to produce antibodies and release histamine.

Histamine irritates the upper respiratory passages, making them swell and producing the typical hay fever symptoms.

A tendency to suffer allergies is often hereditary. The most common causes of hay fever are:
tree pollen such as elder, elm, hazel and especially birch (spring hay fever).
grass pollen (any folwers, plant or trees).
mugwort and hybrids such as chrysanthemum (autumn hay fever).
house dust mites and mould fungus - particularly associated with perennial allergic rhinitis.

Symptom

Cause hay fever

Treatment

Chinese Master's herbal medication has provern to be very effective to cure Hay Fever, the course usaually takes 4 weeks, you may need one or more course to take away all the problems and inconvience .

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