Winter is not the season usually associated with pollen allergy. However, pollen grains from certain trees appear in Winter, which can induce allergic reaction on inhalation leading to sneezing, wheezing, and triggering of asthma attack. Pollen grain from mountain cedar trees, which grows in abundance in the Southern United States is a predominant source of allergy in December.”The pollen appears copiously from late fall to late winter” inducing misery to patients with sinus allergy and asthma. Other Juniper species include red eastern cedar.
Treatment for allergy to cedar pollen is basically allergy shots; pollen extract immunotherapy produces significant decreases in symptoms during the cedar pollen season. Patients experiencing worsening of allergy symptoms during winter may consult allergists for possible immunotherapy (allergy shots).