What causes allergy in May?

Posted at 5:10 pm on 01/21/2015 by Powlin V. Manuel MD, MBA, MS.
Allergic rhinitis

Allergic rhinitis

Mulberry Pollen

Mulberry Tree

Mulberry Tree

 

May is the month inwhich mulberry treesstart pollination.Pollen of red andwhite mulberry, andpaper mulberry arereleased in  largequantities. Pollen ofred, white, and papermulberry are highlyreactive to those withan allergy to mulberrypollen. Red mulberryis native to the whole of Eastern  United States, while white and papermulberry are seen in the warmer regions of the country. Symptoms ofsneezing, blocked nose, and itchy eyes are very frequent when the allergenicpollen is inhaled or in contact with the eyes.

Mulberry Tree

Mulberry Tree

Grass Pollen Allergy

Grass pollen allergy

Grass pollen allergy

Early spring is marked by green, and that means grass pollen in the air. Allergy to grass pollen is commonly associated with allergic rhinitis (sinus allergy) with sneezing and blocked nose, allergic conjunctivitis with eye watering, swelling of eye lids, and triggering of an asthma attack. Grass pollen allergy is diagnosed by skin tests or blood tests. If allergy tests show positive results and if the symptoms are worse during grass pollen season,  allergy shots are prescribed to help develop a tolerance to grass pollen. Recently oral allergy treatment by sublingual route has been introduced.

Pecan Tree Pollen Allergy

Pecan trees are producing the flowers  in April and continue with pollination in May; many individuals are allergic to pecan pollen. The trees are identified by its long sickle shaped leaves, with pointed tips. Pollen is associated with sinus symptoms – sneezing, blocked nose and post-nasal drip.

Pecan Pollen Allergy

Pecan Pollen Allergy

 

 

Oak trees started pollinating in March and continue to produce large quantities of pollen in air.  Different types of pollinating oak tress include: Chapman Oak, Post Oak, Swamp  Oak, Overcup Oak, Bur Oak, White Oak, Southern Red Oak, Turkey Oak, Black Oak, Northern Pin Oak, Scarlet Oak, Pin Oak, Bear Oak, etc., depending on which part of the country you live. Time of appearance of pollen in air can differ based the onset of warm weather. You develop symptoms of allergy to Oak Tree Pollen because of presence of an antibody called IgE antibody to Oak Tree Pollen, which is usually an inherited mechanism. When the pollen appears in air, and when you come into contact with them in the nose or the eyes, you release a chemical called histamine, which cause redness and itching of eyes.

Oak tree pollen allergy

Oak tree pollen allergy

 Walnut Tree Pollen Allergy

Walnut tree pollen appear in May and are associated with symptoms of sneezing, blocked nose, runny nose, and itchy-eyes. Black Walnut trees are large with open rounded crown of dark green color. The trees carry pinnate leaves. They pollinate in early spring. Diagnosis of Walnut Pollen allergy is made by allergy skin tests or blood tests. Once diagnosed allergy shots are prescribed if the symptoms are severe enough. There is no connection between Walnut pollen allergy and allergy to Walnuts.


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