Worth knowing about hay fever
Probably almost one in five. Studies in recent years have found that 15-20% of the total population at least temporarily struggling with hay fever - trend rising for years. Especially in children. Here also the allergic cold is added, which is not based on pollen, but e.g. is due to a house dust allergy. So "hay fever" is the generic term here and should not be taken literally.
Most of the time, hay fever (allergic rhinitis) starts at school age. But there is no rule.
That depends on how you define the term. One speaks medically correctly of the allergic rhinitis or - even more medically and thus still incomprehensible - of allergic rhinitis. The allergic rhinitis can be triggered by pollen, but also by pet hair, dust mites or other irritants.
In people with hay fever (allergic rhinitis), the nasal mucosa is often heavily swollen. As a result, the nasal secretions run off worse and it comes to the typical stuffy nose.
Pollen, or rather pollen grains are in the broadest sense the sperm of the plants. Namely the seed plants. These are germ cells or microspores. They are carried away by a plant (usually by wind, but also by water or animals) and unite - if they are lucky and land properly - with the ovary of another plant of the same species.
Yes, that is possible. If hay fever remains untreated, the risk of developing asthma is 50-70%. Incidentally, this also applies to some other allergies that have nothing to do with pollen.
Put simply, when the allergy becomes an asthma. And to be more precise: If the annual hay fever suddenly becomes a tormenting cough, pressure or tightness in the chest and breathing difficulties, then the allergy has "changed the floor": from the nose down into the deeper airways, the bronchi.