Allergic rhinitis: Difference between revisions

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Allergic rhinitis, colloquially known as hay fever, is a type of [[Inflammation|inflammatory]] response that occurs in the nasal passages and conjunctiva (the white of the eyes). This condition is primarily driven by an allergic response and leads to a variety of symptoms including sneezing, rhinorrhea (runny nose), and ocular discomfort.
{{Infobox medical condition
| name            = Allergic rhinitis
| image          =[[File:Misc_pollen_colorized.jpg|thumb|Colorized pollen grains from a variety of common plants.]]
| caption        = Colorized pollen grains from a variety of common plants.
| field          = [[Allergy]]/[[Immunology]]
| synonyms        = Hay fever, pollinosis
| symptoms        = [[Runny nose]], [[sneezing]], [[itchy eyes]], [[congestion (medical)|nasal congestion]]
| complications  = [[Sinusitis]], [[asthma]], [[otitis media]]
| onset          = Often in [[childhood]] or [[adolescence]]
| duration        = Long-term, with seasonal or perennial variations
| causes          = [[Allergen]]s such as [[pollen]], [[dust mites]], [[animal dander]], [[mold]]
| risks          = [[Family history]], [[atopy]], [[environmental exposure]]
| diagnosis      = [[Medical history]], [[skin prick test]], [[specific IgE blood test]]
| differential    = [[Common cold]], [[vasomotor rhinitis]], [[non-allergic rhinitis]]
| prevention      = Avoidance of known allergens, [[air filtration]]
| treatment      = [[Antihistamines]], [[nasal corticosteroids]], [[decongestants]], [[allergen immunotherapy]]
| frequency      = Affects 10-30% of the global population
| deaths          = Rarely life-threatening
}}
[[File:Blausen 0015 AllergicRhinitis.png|thumb|Diagram illustrating the symptoms of allergic rhinitis.]]
[[File:Epikutanni-test.jpg|thumb|Epicutaneous test, a method used to diagnose allergic rhinitis.]]


=== Etiology and Pathophysiology ===
'''Allergic rhinitis''' is an [[inflammation]] of the inside of the [[nose]] caused by an [[allergen]], such as [[pollen]], [[dust]], [[mold]], or [[flakes of skin]] from certain animals. It is a common condition that affects many people worldwide.


Allergic rhinitis is caused by an allergic reaction to airborne substances, known as [[Allergen|allergens]]. Common allergens include pollen, dust mites, mold spores, and animal dander. When these allergens are inhaled, they stimulate the immune system of susceptible individuals to produce [[Immunoglobulin E|IgE antibodies]]. Upon subsequent exposure, these antibodies bind to the allergens, triggering a cascade of immune responses that result in the release of histamines and other inflammatory substances from mast cells and basophils in the nasal and ocular tissues.
==Signs and symptoms==
The symptoms of allergic rhinitis include:
* [[Sneezing]]
* [[Itchy]] nose, eyes, or roof of the mouth
* [[Runny nose]]
* [[Nasal congestion]]
* [[Postnasal drip]]
* [[Cough]]
* [[Fatigue]]


=== Clinical Presentation and Symptoms ===
These symptoms can vary in severity and may be seasonal or perennial, depending on the type of allergen involved.


The primary symptoms of allergic rhinitis include frequent sneezing, nasal congestion, runny nose, and itchy or watery eyes. It may also cause postnasal drip, which can lead to coughing, throat irritation, and a decreased sense of taste and smell.
==Causes==
Allergic rhinitis is triggered by an [[immune system]] response to an allergen. Common allergens include:
* [[Pollen]] from trees, grasses, and weeds
* [[Dust mites]]
* [[Animal dander]]
* [[Mold spores]]


Allergic rhinitis is often associated with other allergic conditions such as [[Asthma]], [[Atopic Dermatitis]], and [[Conjunctivitis]]. The severity of symptoms can vary greatly between individuals and may be influenced by the level of allergen exposure and individual sensitivity.
When a person with allergic rhinitis inhales an allergen, their immune system mistakenly identifies it as harmful and releases [[histamine]] and other chemicals, leading to the symptoms of an allergic reaction.


=== Diagnosis ===
==Diagnosis==
Diagnosis of allergic rhinitis is typically based on a combination of medical history, physical examination, and allergy testing. Common diagnostic methods include:
* [[Skin prick test]]
* [[Blood test]] for specific [[IgE antibodies]]
* [[Epicutaneous test]]


Diagnosis of allergic rhinitis is typically based on the patient's history, physical examination, and response to therapy. Skin testing or allergen-specific IgE blood tests may be used to identify the specific allergens causing the symptoms.
==Treatment==
Treatment for allergic rhinitis aims to relieve symptoms and may include:
* [[Antihistamines]]
* [[Decongestants]]
* [[Nasal corticosteroids]]
* [[Allergen immunotherapy]]


=== Treatment ===
Avoidance of known allergens is also a key strategy in managing allergic rhinitis.


Treatment strategies for allergic rhinitis aim to reduce symptoms by avoiding allergens, using pharmacological therapies, or undergoing immunotherapy. Pharmacological treatments include antihistamines, decongestants, corticosteroid nasal sprays, and leukotriene receptor antagonists. Immunotherapy, such as allergy shots or sublingual tablets, may be an option for individuals with severe symptoms or those who do not respond to other treatments.
==Prevention==
 
Preventive measures for allergic rhinitis include:
== See Also ==
* Keeping windows closed during high pollen seasons
 
* Using air filters
* [[Allergy]]
* Regular cleaning to reduce dust and mold
* [[Immunoglobulin E]]
* Avoiding exposure to pets if allergic
* [[Histamine]]
== References ==
{{Reflist}}


==Related pages==
* [[Asthma]]
* [[Sinusitis]]
* [[Eczema]]
* [[Anaphylaxis]]
[[Category:Allergology]]
[[Category:Allergology]]
[[Category:Respiratory system diseases]]
[[Category:Respiratory diseases]]
[[Category:Immunology]]
[[Category:Immune system disorders]]
[[Category:Otorhinolaryngology]]
{{ent}}
{{stub}}

Latest revision as of 02:37, 4 April 2025

Allergic rhinitis
Colorized pollen grains from a variety of common plants.
Synonyms Hay fever, pollinosis
Pronounce N/A
Specialty N/A
Symptoms Runny nose, sneezing, itchy eyes, nasal congestion
Complications Sinusitis, asthma, otitis media
Onset Often in childhood or adolescence
Duration Long-term, with seasonal or perennial variations
Types N/A
Causes Allergens such as pollen, dust mites, animal dander, mold
Risks Family history, atopy, environmental exposure
Diagnosis Medical history, skin prick test, specific IgE blood test
Differential diagnosis Common cold, vasomotor rhinitis, non-allergic rhinitis
Prevention Avoidance of known allergens, air filtration
Treatment Antihistamines, nasal corticosteroids, decongestants, allergen immunotherapy
Medication N/A
Prognosis N/A
Frequency Affects 10-30% of the global population
Deaths Rarely life-threatening


Diagram illustrating the symptoms of allergic rhinitis.
Epicutaneous test, a method used to diagnose allergic rhinitis.

Allergic rhinitis is an inflammation of the inside of the nose caused by an allergen, such as pollen, dust, mold, or flakes of skin from certain animals. It is a common condition that affects many people worldwide.

Signs and symptoms[edit]

The symptoms of allergic rhinitis include:

These symptoms can vary in severity and may be seasonal or perennial, depending on the type of allergen involved.

Causes[edit]

Allergic rhinitis is triggered by an immune system response to an allergen. Common allergens include:

When a person with allergic rhinitis inhales an allergen, their immune system mistakenly identifies it as harmful and releases histamine and other chemicals, leading to the symptoms of an allergic reaction.

Diagnosis[edit]

Diagnosis of allergic rhinitis is typically based on a combination of medical history, physical examination, and allergy testing. Common diagnostic methods include:

Treatment[edit]

Treatment for allergic rhinitis aims to relieve symptoms and may include:

Avoidance of known allergens is also a key strategy in managing allergic rhinitis.

Prevention[edit]

Preventive measures for allergic rhinitis include:

  • Keeping windows closed during high pollen seasons
  • Using air filters
  • Regular cleaning to reduce dust and mold
  • Avoiding exposure to pets if allergic

Related pages[edit]

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