Vilka är de olika höfeber -orsakerna?

höfeber är en allergisk reaktion som kan uppstå säsongsmässigt eller året runt. Hösfebersymtom under vårens och fallet kan orsakas av inandning av allergener såsom pollen eller mögelsporer. Pet Dander och Dust Mites utlöser ibland symtom på höfeber. I motsats till dess namn orsakas inte höfeber av exponering för hö, och dess symtom inkluderar inte feber. Hay fever causes symptoms that may affect the eyes, ears, and nose of an affected person.

Hay fever may result when a person inhales an airborne substance called an allergen. Allergener kommer in i kroppen genom munnen, näsan, halsen och lungorna. They are not usually harmful, but once they are inside the body, the immune system may identify them as dangerous and produce antibodies to attack them. The next time a person inhales the same allergen, the immune system may recognize it and begin to produce a chemical called histamine to counteract the allergen.

När histamin kommer in i blodetstream, it can cause inflammation. This inflammation results in the symptoms of hay fever, which can include itchy, watery eyes, coughing and sneezing. Other symptoms include sinus pressure and a decreased ability to smell and taste. A person suffering from hay fever may also suffer from fatigue and feel like their ears are plugged.

Those who have hay fever may experience increased symptoms in the spring and fall of the year, when plants release pollen, or "pollinate." Pollination may depend on the local climate, the amount of rainfall, and the type of plant. Växt pollens som vanligtvis orsakar höfeber på våren inkluderar de partiklar som frigörs av gräs, träd och vissa typer av ogräs, särskilt ragweed. Approximately 75 percent of those who suffer from allergies are estimated to be allergic to ragweed. Some weeds also may release pollen in the fall.

Mold is one of the most common hay fever causes. It is often present indoors and outdoors at all times of the year. Mold thrives indoors in damp environments like basements and bathrooms and outdoors in moist conditions such as compost piles. Mold produces "spores," which are present in the air, contained in water, or carried by insects. If these spores enter the body, they may trigger an allergic reaction such as hay fever.

Dust mites may also be common hay fever causes. Dust mites are microscopic, spider-like creatures that are present in household dust, carpeting, and bedding. They typically feed on dead skin cells and cause hay fever symptoms when they invade the body. Det kan inte finnas något sätt att helt eliminera dammkvalster, men de kan kontrolleras genom att minska fuktigheten i hemmet och genom att tvätta sängkläder i varmt vatten.

Pet dander is flaky dry skin visible on the fur of cats and dogs and the feathers of birds. Pet dander resulting in hay fever causes symptoms including sneezing, runny nose,and itchy eyes. The hair or feathers alone is not believed to be the cause of the irritation. Rather, the pollen, mold, and dust particles that collect on the pet's fur or feathers are believed to trigger the allergic reaction.

Pet Dander kan också transporteras till en plats där husdjuret aldrig har transporterats, ibland transporterats på kläderna hos en person som utsätts för husdjuret. Detta kan orsaka SET -allergier och symtom för hösfeber hos en person som aldrig har varit i ett husdjur. Pet Dander kan stanna kvar i ett hem upp till sex månader efter att djuret har tagits bort.