Coping With San Diego’s Year-Round Allergy Season

An allergist explains the unique conditions that produce Southern California’s never-ending allergy season and offers tips to keep symptoms under control

More than half of the nation’s population test positive for at least one allergy, according to a 2005 study published in The Journal of Allergy and Clinical Immunology. And while San Diegans who moved here from other regions are often surprised to find the seasonal allergies they suffered with back home seem to disappear, they might be surprised to learn San Diego has an allergy season, too. It begins January 1 and ends December 31.

“This region is unique. Theoretically, if the wind is blowing off the ocean, we should have very little pollen in the air,” says Ronald Simon, MD, an allergist at Scripps Health in San Diego. “But when we get a Santa Ana wind condition, we get hit with allergens from as far away as Nevada and Arizona. And after rains, the trees and weeds and grasses in our canyons wake up and send out pollen clouds.”

Allergies can make colds worse

Because San Diego doesn’t have four distinct seasons like the East and the Midwest, allergens are in the air constantly. This can exacerbate nasal allergies, triggering chronic drainage and congestion, leaving allergy sufferers vulnerable to sinus infections, bronchitis and colds.

“We catch colds, not because people cough or sneeze around us, but because we touch surfaces that have the virus on them and then touch our nose, eyes and mouths,” says Dr. Simon. “People with allergies touch and rub more than other people, making it more likely they will pick up the virus. In addition, they can’t clear colds and infections as easily as non-allergic people because of underlying chronic allergic inflammation in the nose and lungs.”

Indoor allergies are different here too

Because Southern California never experiences hard freezes and frosts, mold spores never entirely go away here. In fact, local rain patterns and cool temperatures create optimal conditions for them to multiply.

Surprisingly, in many parts of the country house dust mites are seasonal as well, requiring humidity to reproduce. But in San Diego, they can be found in high quantities year-round. Between the humidity of the rainy season and homes that aren’t completely weather-tight, the months between October and March are especially troublesome for people who are sensitive to these microscopic insects.

Keep allergy symptoms under control

During the most active allergen periods, sufferers can generally manage their own symptoms at home. Dr. Simon recommends five tools to help.

  1. Avoidance and barriers
    If you know you suffer from allergies to animal dander, for example, you should minimize time spent around pets and get zip-up encasements for your mattress and pillows that trap dust mites inside, away from the nose and lungs. You can keep those kicked-up mites (as well as other particulates) out of the respiratory system by wearing an inexpensive N-95 respirator from the hardware store when you dust or vacuum, or when there are problems with outdoor dust, smoke and other irritants.
  2. Nasal and sinus rinsing
    Neti pots and over-the-counter squeeze-bottle nasal rinsing systems may offer some relief by washing fine allergens out of sensitive nasal passages and sinuses. But the stream or mist of water should be gentle, not forceful. For people who have had surgery on their sinuses, there are electric irrigators, but Dr. Simon stresses these are not normally recommended for allergy symptoms alone.
  3. Antihistamines
    These drugs relieve itching, sneezing a watering of the eyes and nose. While the safest, most effective allergy medications used to be prescription-only and pricey, Dr. Simon says nearly all allergy medicine now have less expensive generic equivalents or are available over-the-counter. Some are even non-sedating.
  4. Decongestants
    For the congestion that can result from constant exposure to allergens, Dr. Simon says it’s important to choose a decongestant, not an antihistamine. OTC medications with a –D after their name contain decongestant as well as the primary medication, and can help reduce swelling in the nose and lungs as needed. However, they can also cause nervousness, fast heartbeats, insomnia and—in some people—increased blood pressure.
  5. Prescription steroid sprays
    Dr. Simon says that daily use of these sprays, inhaled via the nose, can eliminate nearly all allergy symptoms. “I tell people to try it for a month,” he says. “In addition to relieving what they perceived as their allergy symptoms, many people come back and say, ‘oh, this is how I’m supposed to feel! I can sleep and taste my food again and my energy is back!’”

Learn more about managing allergies

To find a Scripps allergist who can help you identify your allergic triggers and manage your symptoms, visit the Doctor Finder or call 1-800-SCRIPPS (1-800-727-4777) to get a physician referral from a member of our call center.

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