NIGHTTIME ALLERGIES:

WHY DO YOUR ALLERGY SYMPTOMS
SEEM WORSE AT NIGHT?

Are nighttime allergies getting in the way of your sleep? Learn why your allergies may be worse at night and what you can do about it.

Allergy sufferers often experience worse symptoms at night — just when they’re hoping to get some rest and relief. Your bedroom, however, likely contains triggers that can set off nighttime allergies.

COMMON NIGHTTIME
ALLERGENS

Your mattress, bedding, pillowcase and blanket all contain microscopic dust mites that feast on dead skin cells and can cause allergy symptoms. If a pet sleeps in the bed, dust mites are even more plentiful, as is pet dander, another typical trigger for sneezing and coughing at night. Mold and pollen are also common culprits for nighttime allergies.

WHY YOUR ALLERGIES MAY SEEM WORSE AT NIGHT

While dust mites are the leading cause of nighttime allergy symptoms, a range of other factors can cause symptoms to flare up. Levels of some types of pollen, for example, increase at night, and simply the act of lying down in bed can result in coughing or wheezing, which may disturb your sleep. When you’re trying to fall asleep, you’re not physically active and therefore you’re probably more aware of your symptoms than you are during the day.

^* Use the “hot” setting on your washing machine.

^† Make sure to follow the manufacturer’s recommended maintenance schedule to replace them as needed.

^‡ Dust mites and mold spores thrive in humid environments. A cooler temperature will reduce humidity.

REFERENCES

“Why Are My Allergies Worse at Night?” Carolina Asthma & Allergy Center. December 2019. Accessed October 10, 2021. https://www.carolinaasthma.com/blog/why-are-my-allergies-worse-at-night/.
Klein S. “5 Reasons Your Allergies Are Worse at Night.” Health. March 2018. Accessed October 10, 2021. https://www.health.com/condition/allergy/allergies-worse-at-night.
McDonald LG, Tovey E. “The role of water temperature and laundry procedures in reducing house dust mite populations and allergen content of bedding.” J Allergy Clin Immunol. October 1992. Accessed October 10, 2021. https://pubmed.ncbi.nlm.nih.gov/1401643/.
Koinis-Mitchell D, Craig T, Esteban CA, Klein RB. Sleep and allergic disease: a summary of the literature and future directions for research. J Allergy Clin Immunol. 2012;130(6):1275-1281. doi:10.1016/j.jaci.2012.06.026.
Romano M, James S, Farrington E, Perry R, Elliott L. The impact of perennial allergic rhinitis with/without allergic asthma on sleep, work and activity level [published correction appears in Allergy Asthma Clin Immunol. 2020 Feb 5;16:12. doi: 10.1186/s13223-020-0408-4.]. Allergy Asthma Clin Immunol. 2019;15:81. Published 2019 Dec 6. doi:10.1186/s13223-019-0391-9.

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