We can distinguish several forms of rhinitis, which have different causes.
Causes of infectious rhinitis
Infectious rhinitis is an inflammation of the mucous membranes of the nose usually due to a viral infection, which can sometimes be complicated by a bacterial infection.
Several factors (cigarettes, local or general fragility, some drugs ...) have been incriminated to promote the occurrence of infectious rhinitis.
Causes of allergic rhinitis
When rhinitis is of allergic origin, the inflammation of the mucous membranes of the nose is triggered by the contact of the respiratory tract with the allergen (pollens, mites, animal hair, dust ...). The causes are substances in the air, which the body mistakenly perceives as dangerous, triggering a protective reaction, that is to say, the allergic reaction.
Causes of seasonal allergic rhinitis
Seasonal allergic rhinitis, or hay fever, is triggered by the presence in the air of certain pollen, and occurs during the flowering periods of certain plants (cypress, birch, grasses, ragweed ...).
Chronic allergic rhinitis, or perennial, lasts all year round, because it is triggered by allergens present in the air permanently (dust, animal hair, mites ...). These allergic rhinitis can be of occupational origin.
In some cases, rhinitis can occur in the absence of any infectious or allergic cause. It may be vasomotor rhinitis, the causes can be very diverse, such as the misuse of vasoconstrictor drugs.
Pollens: red alert or green light?
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Read also :
> An allergic reaction: what is it?
> Mite allergy
> Pollen allergy