A Simple Guide to Allergies

A Simple Guide to Allergies
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What are Allergies?
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Allergies are the immune system's reaction to a harmless substance foreign to the body.

In some people this reaction causes a uncomfortable symptom like rashes or swelling of the eyelids.

In severe cases it can even cause peeling of the skin or kidney damage.

What are the Common causes of Allergies?
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The most common causes of allergies are pollen and dust mites.

Besides these, there are a wide range of substances that can trigger an allergic response.

Pollen:
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Pollen is the seeds or spores released by flowers or plants during pollination phase of plants and usually is higher in summer. Some countries shows the daily pollen index in the media during summer to warm allergen sufferers the risks of allergy during this peroid.
Pollens irritate the sensitive mucusal lining of the nose and the epithelium of the skin causing inflammation and swelling.

Dust mites:
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Dust mites are microscopic parasites who live on the skin flakes shed by the human body every day. They can found just about everywhere on the floor, carpets, on mattresses, pillows, bed covers, clothes and upholstery.
The faeces from the dust mite is the main substance which causes sneezing and wheezing.

House dust like dander from animals, cockroach faeces, bacteria, moulds, fungus spores and dust mites are the main cause of allergies in any family.

Moulds
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Moulds are microscopic fungi with spores floating in the air like pollen.
They are usually found in damp areas indoors such as the basement or bathroom, as well as outdoors in grass, leaves, hay, or under plants.


Animal proteins
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Proteins found in an animal's skin and saliva can cause allergy to skin, nose and lungs in some people.

Food allergens
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Certain foods especially eggs, milk, nuts, and seafood, induce intestinal and skin reactions frequently in children who often outgrow it after puberty.

What are the Symptoms of Allergies?
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Allergic symptoms include:

1.itchy, watery nose and eyes,

2.asthma, wheezing and coughing

3.Hives or skin rahes

What is the Treatment of Allergies?
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Treatment depends on the severity of symptoms.

In severe cases of allergy:

1.adrenaline injection is used in life-threatening situations to reduce acute swelling of the airways.

2.Antihistamines can help relieve symptoms such as sneezing and running nose.

3.Bronchodilators (theophylline and beta-agonists e.g. salbutamol) are used in cases of asthma to open the airways, relieve coughing, wheezing, shortness of breath and difficulty in breathing.

4.Corticosteroids such as dexamethasone may be given to relieve symptoms.
They also reduce the immune reaction to the allergens.

How to prevent allergies?
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The best prevention is to avoid the allergens:

1.Avoid dustmites, pollen.

2.Cover all pillows, mattress,beds etc with special dust mite covers,

3.Avoid food like eggs, milk, nuts, and seafood

4.Desensitisation to Allergens
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Desensitisation to Allergens is by giving small doses of allergen until the body itself become insensitise to allergens.

A Simple Guide to Asthma

A Simple Guide to Asthma
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What is asthma?
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Asthma is a common long-lasting (chronic) inflammatory disease of the lungs and airways (bronchi) that affects 5 % adults and 20% children and causes narrowing of the airtubes.

What happens during an asthma attack?
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When your airtubes are exposed to trigger factors, inflammation of the airway results.
The breathing tubes become narrowed and clogged up with mucus making breathing difficult. Inflammation may continue even though there is minimal or no symptom of asthma.

What are the symptoms of Asthma?
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Asthma is characterised by attacks of

1. breathlessness,

2.tight chest,

3.wheezing sounds and

4.coughing

These symptoms are caused by the airways becoming narrowed and inflamed.
Some people may have these symptoms all of the time.

Others may be normal between attacks.

Who is at risk of developing asthma?
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Anybody can get it at any age but it tends to run in families.
They also have an inherited tendency to develop other allergic conditions such as eczema and allergic rhinitis.
Most children, particularly those with mild asthma will be attack free by adolescence.
A small number continue to have symptoms as adults.
Yet others have their asthma symptoms reappearing only when they reach adulthood.

What causes asthma attacks?
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Asthma results from sensitive airways that react to certain trigger factors.
These triggers may be different for different people.
Avoidance of trigger factors is important.

Some common triggers are:
1.Allergens such as house-dust mites, cockroaches, animal danders, pollen, indoor moulds and foods particularly those containing sulphite.
2.Infections such as the common cold and sinus infection

3.Weather changes due to change in temperature or humidity
4.Air pollution e.g. from tobacco smoke and haze
5.Strong odours or sprays e.g. paints, varnishes, cleaning solvent fumes, perfumes, cooking fumes
6.cold air,
7.vigorous exercise
8.stress.

Attacks may be more frequent or severe in people who have a chest infection.

Avoidance of trigger factors
1.Animal dander (fur, skin of cats or dogs) Give away pet if possible. If not, prevent pet from entering the bedroom. Bathe pet weekly.
2.House-dust mites Use protective air-tight mattress covers and pillow cases. Wash bedsheets and pillow cases weekly in hot water
3.Cockroaches Do not leave garbage uncovered. Use poison baits. Use pesticide spray only when the asthmatic is out of the house.
4.Indoor moulds Reduce dampness in the house.
5.Outdoor pollens Close doors and windows and stay indoors when pollen count is highest in the afternoon.
6.Tobacco smoke and haze Avoid tobacco smoke and haze as far as possible.
7.Medication Aspirin, non-steroidal anti-inflammatory drugs (NSAIDs) and beta-blockers should be avoided.
8.Food Certain foods containing sulphites should be avoided such as shellfish and preserved foods.

What to do during an asthma attack?
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1.Stay calm. Family members or caregivers should be calm, positive and encouraging.
2.Use 2 puffs of your reliever inhaler immediately as previously instructed by your doctor.
If asthma symptoms are not relieved or wheezing returns within 4 hours, give another 2 puffs of the reliever.

3. take your asthma medications with warm water.

4. consult your family doctor if there is no improvement.
If necessary, go to the nearest hospital for help.

How serious is Asthma?
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Asthma is not generally considered by doctors to be a serious illness in most people who have it, mainly due to the mildness of symptoms and the range of very effective medicines that control these symptoms and stop asthma worsening.
Asthma does, however, have an effect on quality of life because attacks can be unpleasant and distressing and can restrict activity. Whilst most sufferers learn to live with and manage their condition, for some it can be disabling.
In exceptional cases, asthma can be life-threatening, particularly if it is not treated adequately or promptly. For some of these, an attack is so severe that it results in death.

How long does Asthma last?
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Asthma attacks come and go, with wide variation in the symptoms at different times.
Many people with asthma have problems only occasionally but others struggle with it every day. Modern medicines control and relieve symptoms and so attacks may only last a few hours or minutes, but without treatment this may go on for several days.
Some children grow out of asthma and some people are only affected at different times of the year.
However, the period of time during which people may have asthma attacks can last for many years or throughout life.

How is Asthma treated?
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There is no cure for asthma, but there are different types of medicines that will help to keep it under control and relieve symptoms.
1.Most sufferers must be given a type of medicine called a preventer, which is usually an anti-inflammatory steroid (of the glucocorticosteroid type) that treats the underlying causes of the asthma. These are usually given from an inhaler.
Even if symptoms are not present, sufferers should keep taking the preventer medicines, as this will greatly decrease the risk of suffering asthma attacks. This will help many asthmatics to live a normal active life.
Steroids can also be taken as tablets but have many side effects.
2.Another sort of medicine is called a reliever that is used during an asthma attack and may be contained in an inhaler. This contains a bronchodilator medicine that opens up the bronchial tubes of the lungs and works in a few minutes. It can also be taken as tablets. Side effects may be rapid heart beats and tremors of hands.

Can asthma be cured?
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No, there is currently no known cure for asthma.

The good news is that modern medicine is extremely effective in controlling symptoms.

You can lead a relatively normal life if you seek to understand how to control your asthma and prevent attacks from occurring.

Asthma attacks may be prevented at a reasonable cost.
It usually requires long term treatment with 'preventer medication'.

What you can do to control asthma?
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ASTHMA MANAGEMENT PLAN
Asthma is a chronic disease requiring continuous management and appropriate treatment.
If you follow your prescribed asthma management plan, you can expect to live an active, normal lifestyle.

Successful treatment of asthma is a partnership between you and your doctor.

You and your doctor should work out an asthma management plan.
This should include:
1.understanding what asthma is all about
2. having clear goals of management
3. knowing the severity of your asthma;
patients with mild asthma can do with just reliever medications to stop the attacks.
On the other hand, patients with severe asthma or those with frequent attacks should go on regular medications to prevent attacks
4.being able to recognise symptoms suggesting worsening of asthma
5.knowing your medicines (preventers and relievers) and how to use them correctly
6.using the right inhaler technique and practicing it until you get it right
7..recognising and avoiding trigger factors
8.knowing what to do during an asthma attack
9..arranging regular follow-up visits with your doctor