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Causes

Food Allergies

Food allergy symptoms are most common in babies and children, but they can appear at any age and range from mild to severe. These eight types of food account for majority of allergic reactions:

- eggs
- milk
- peanuts
- tree nuts
- fish
- shellfish
- wheat
- soy

INDOOR ALLERGIES

Indoor allergens often cause allergic rhinitis or asthma. your doctor can help in determination of severity and cause of the problem. The best defence is to avoid the allergens that cause your symptoms.

The most common indoor allergens are:

- dust mites
- pets
- mold
- chemicals
- perfume

OUTDOOR ALLERGIES

The most common outdoor allergens are:

- Pollen: Tree pollen often causes seasonal allergic rhinitis in early spring.
- Air pollutants: As solid and liquid particles suspended in air. common in high-traffic areas.
- Molds: these are fungi whose spores float in the air.

ALLERGIC DISORDERS

Allergic Rhinitis (Hay fever):

Common symptoms:

- runny nose
- thy eyes, mouth or skin
- sneezing
- stuffy nose

What triggers hay fever?

Although the name suggests it, you don’t have to be exposed to hay to experience its allergic symptoms. Some common other triggers include:

- pet hair
- dust mites
- mold
- cigarette smoke
- perfume
- diesel exhaust
- pollen

The two types of allergic rhinitis:

Seasonal

Usually caused by symptoms of sensitivity to airborne mold spores or pollen, seasonal allergic rhinitis can occur in spring, summer and early fall.

Perennial

People with perennial allergic rhinitis experience symptoms year-round. it is generally caused by dust mites, pet hair or dander, cockroaches or mold.

Allergic rhinitis and asthma:

The connection between the allergic rhinitis and asthma had been known for centuries, although they are treated as separate disorders due to specializations in medicine. many times an individual may suffer from both these airway disorders at the same time, and uncontrolled allergic rhinitis can lead to worsening of co-existing asthma. it is important to effectively manage allergic rhinitis, as effective treatment of nasal disease have shown benefits in preventing the development of asthma, and on existing asthma symptoms.

Hives

Hives, also known as urticaria, can be triggered by many substances or situations and usually starts as an itchy patch of skin that turns into swollen red welts.

Common symptoms of hives:

- raised itchy bumps, either red or white
- welts that vary in size, change shape, and appear and fade repeatedly as the reaction runs its course

What triggers hives?

- food like peanuts, eggs, nuts, cheese and shellfish
- pet dander
- medications, such as antibiotics (penicillin and sulfa), aspirin and ibuprofen
- insect stings or bites
- physical stimuli, such as pressure, cold, heat, exercise or sun exposure
- blood transfusions
- bacterial infections, including urinary tract infections and strep throat
- viral infections, including the common cold, infectious mononucleosis and hepatitis
- pollen
- plants, such as poison oak and poison ivy