Amy Bain MSN, ARNP, CPNP Pediatric Asthma & Allergy 175 1st Pl NW Issaquah, WA 98027 Telephone: (425) 651 - 4044 Fax: (425) 651 – 4033 Email: amy@breathepediatrics.com Appointments: www.breathepediatrics.com Allergic Rhinitis What is Rhinitis? Rhinitis is a term used to describe the symptoms produced by nasal irritation or inflammation. Symptoms of rhinitis include: runny nose, itching, sneezing, and stuffy nose due to blockage or congestion. These symptoms are the nose’s natural response to inflammation and irritation and they are often associated with itching of the eyes. The nose normally produces mucus, which traps substances like dust, pollen, pollution and germs such as bacteria and viruses. Mucus flows from the front of the nose and drains down the back of the throat. When mucus production is excessive it can flow from the front as a runny nose or become noticeable in the back of the throat as a “post-nasal drip”. When post-nasal drip is excessive or thick, cough is the natural response for clearing the throat. The nasal tissues congest and decongest periodically. Nasal congestion occurs when the tissues lining the nose are swollen, which is due to inflamed blood vessels. Severe congestion can result in facial pressure and pain as well as dark circles under the eyes. puffiness around the eyes. Allergic rhinitis is common and affects almost 30% of adults and 40% of children. During the physical examination patients are often found to have the following signs of allergies: Nasal crease: A horizontal crease across the lower half of the bridge of the nose; caused by repeated upward rubbing of the tip of the nose by the palm of the hand. Also called an “Allergic Salute” Nose: Swollen and pale nasal tissue or turbinates; Thin, watery nasal secretions. Ears: Middle ear fluid Eyes: Swollen and red eyelids, red and inflamed whites (conjunctiva) of the eyes with excess tear production; Dennie-Morgan lines (extra skin folds or creases from the inner-bottom eyelid); and dark circles around the eyes (also known as “allergic shiners”) Mouth/Throat: "Cobblestoning," which is streaks of lymphoid tissue on the back of the throat that has a cobblestone appearance; enlarged tonsils What is Allergic Rhinitis? The most common kind of rhinitis is allergic rhinitis, which is usually triggered by airborne allergens. An allergen is a material that can cause an allergic reaction such as pollen and dander. In addition to the symptoms noted above, allergic rhinitis may cause additional symptoms such as headache, fatigue, malaise, and cognitive impairment. The allergens may also affect the eyes, causing watery, reddened, or itchy eyes and What Causes the Sneezing, Itchy Eyes and Other Symptoms? Allergic rhinitis occurs when an allergen is inhaled by an individual with a sensitized immune system and the body’s immune system reacts abnormally with the allergen and triggers allergen-specific immunoglobin E (IgE) antibody production. These allergic antibodies bind to mast cells, which are located within the nose tissues and contain histamine. When the allergen is inhaled into the nose the mast cells are stimulated and histamine (and other chemicals) are released, which causes runny nose, watery eyes, itching, swelling, and mucus production. Symptoms outside of the nose, including fatigue, sleepiness, and malaise, can occur from the inflammatory response. These symptoms often contribute to impaired quality of life. Nasal antihistamine sprays – Locally inhibits histamine release in the nose helping to control allergic symptoms Non-prescription saline nasal sprays – Help to counteract symptoms of dry nasal passages or thick nasal mucus and may be used as often as needed. 2) Controlling Dust Mites in the Home Antibodies circulate in the blood stream, but localize in the tissues of the nose and in the skin. This makes it possible to show the presence of these antibodies by skin testing, or less commonly, by a special IgE blood test. A positive skin test mirrors the type of reaction going on in the nose. Can Allergic Rhinitis Lead to Additional Health Problems? If allergies are not treated complications can occur such as: Ear infections, sinusitis, recurrent sore throats, cough, headache, altered sleep patterns, fatigue, irritability, poor school performance and worsening asthma. Dust mites can be a major health concern to people with indoor allergies. There is no way to completely eliminate dust mites, but controlling them can reduce a person’s risk of suffering from the health problems associated with them. While you sleep, dust mites are lurking in your mattresses and bed sheets. There are several things that can be done to reduce the dust mite population in your bedding and home and include the following: What is the Treatment for Allergic Rhinitis? 1) Medications Antihistamines – The most inexpensive and commonly used treatment for rhinitis. These medications counter the effects of histamine. They do not cure allergic rhinitis, but help relieve the symptoms associated with it. The most effective way to use them is before symptoms develop. Sometimes people complain that “the medication didn’t work,” but that is most likely due to inconsistent use. If the medication had been taken regularly for 3-4 days and built up in the blood levels, it would have been effective. Therefore people with chronic allergies usually benefit from taking a daily antihistamine. The most common side effect is drowsiness, but many of the newer antihistamines do not have drowsiness side effects. Nasal corticosteroid sprays – Reduces the swelling occurring from the allergic trigger(s) Wash your bedding weekly (blankets, covers, sheets) – It is the simplest solution to controlling dust mites. Use the washing machine with the “Hot” water setting (130 degrees). Pillows – It is recommended that you replace feather and down pillows with those that have synthetic materials as a filling, and encase the pillows with zippered dust-proof covers under the regular pillow cases. Blankets – It is recommended that you replace wool blankets with cotton or nylon. There are mite proof duvet covers that can encase “big blankets/comforters”. Avoid down comforters. Mattresses – Using dust-proof or dust mite allergy mattress covers help prevent a dust mite infestation. Research also shows that covering your mattress with fitted sheets helps slow the accumulation of skin scales. Flooring and Carpeting – Carpeting is one of the most common breeding grounds for dust mites. There are potentially tens of thousands of dust mites that can live in a square yard of carpet! It is recommend that carpeted areas are vacuumed regularly with a vacuum equipped with a HEPA (high energy particulate air) filter. A HEPA filter removes 99.7 percent of the airborne particles that are 0.3 micrometers or larger. A more drastic approach to combating dust mites is to replace carpeting with vinyl or wood flooring. Air – Dust mites thrive in high humidity conditions, but this can be reduced to under 50% humidity by using de-humidifiers and air conditioners. If using a humidifier in the winter, avoid over-humidification. Mites grow best at 75-80% relative humidity and cannot live at under 50% humidity. Use a humidity gauge to monitor levels. To remove dust mite allergen from the air, researchers suggest an air filtration system, especially ones that use a HEPA filter. De-clutter Bedroom – Remove all (or majority) of the stuffed toys from the bedroom and sleeping areas. If unable to remove all stuffed toys, buy toys that are machine washable and wash in HOT water every 1-2 weeks. Remove upholstered furniture and replace with wooden, plastic, vinyl, leather, or cloth furniture constructed with an additional allergen barrier. Avoid heavy curtains and venetian blinds; use window shades instead. If curtains are used, launder them regularly. Avoid wall pennants and other dust collectors. 3) Avoidance Pollen: Since pollen is seasonal it does not cause symptoms year round. During different times of the year various pollens “peak” (pollinate) and depending on the climate they can cause problems for 4-6 months of the year for many people (see pollination table). While it is difficult to escape pollens, here are some ways to lessen the exposure: Keep windows closed and use air conditioning in the summer if possible. A HEPA filter may help clean pollen from indoor air. Don’t hang clothes out to dry as pollen may cling to towels and sheets. The outdoor air is most heavily saturated with pollen and mold between 5 – 10am, so early morning is a good time to limit outdoor activities. Pollen Calendar Pacific NW Try to stay indoors when the pollen count is high, and on windy days when dust and pollen are blown about. Mold: Mold can be both an indoor and outdoor concern. In the Pacific NW outdoor mold allergies are not as common as in other parts of the U.S. because when it is damp outside it is also generally cold. However, any house can develop a mold problem given the right conditions. Mold requires 2 factors to grow: moisture and something to grow on. Moisture can occur from humidity above 50%, leakage from pipes or foundation, and air conditioning. Decrease moisture in the home. This is also helpful for mites, since they cannot live if humidity is less than 50%. Do not use (or over use) vaporizers or humidifiers. Use bleach (1 part bleach to 9 parts water), or Tilex for visible mildew on bathroom grouting or window frames. Avoid compost piles, hay, and piles of raked leaves. Dogs: Dogs also are a common indoor allergen. For patients with prick positive reactions, it is best to keep the animal out of the house. Even with removing the dog from the home, it will take between 6-18 months to completely remove dog dander, unless carpets and upholstered furniture are replaced at the same time. There is no truly allergenic free dog, but some breeds tend to cause fewer problems for allergy sufferers. These include: Poodle and Labradoodles, Schnauzer, Portuguese Water Dog, Soft-Coated Wheaten Terrier, Maltese, Lhasa Apso, Yorkshire Terrier, Shih Tzu, Irish Water Spaniel, and Kerry Blue Terrier. Keep the dog 100% out of the bedroom. Limit the dog to rooms with hard surfaces for easier cleaning. Hard surface floors are best, since carpets become a huge reservoir for animal dander. Leather furniture accumulates far less allergic protein than upholstered furniture. Washing the dog weekly may reduce the allergic protein that would otherwise be deposited throughout the home. Wash your hands thoroughly after direct contact with the dog so that you don’t spread the dog dander from your fingernails to yourself afterwards. Consider purchasing a room HEPA filter that can diminish dog dander from the air. Cats: Cat allergen comes from a protein present in the dander, saliva, sebaceous glands (oil), urine and feces of cats. It is microscopic in size and can easily be inhaled into the nose or lungs to cause allergic symptoms. Male cats shed more allergen than female cats. At least 2% of the population is allergic to cats, and 1/3 of these people have a cat in the house. There are a few breeds thought to be less allergenic. These include Rex breeds, Sphynx Cats and Siberian Cats. The following steps can be taken to reduce the level of cat allergen in the home: Remove the cat entirely from the home. If this is not possible, keep the cat outdoors all or some of the time. Limit an indoor cat to a single area of the house, preferably an uncarpeted room. This, in addition to vacuuming, air filtration and cat washing can reduce the cat dander by 90%. Keep the cat out of the bedroom of the allergic patient. Keep the house well ventilated. An energy efficient house actually traps animal dander inside. A HEPA filter can reduce the level of airborne cat allergen by about 50%. Shampoo the cat in warm water for 10 to 15 minutes once a week to remove much of the surface allergen. Express as much water as possible before towel drying the cat. You can dry the cat further with a blow dryer set to its lowest setting. Cats bathed from a young age usually do not mind being washed. A significant decrease in allergen does not occur for 3 to 8 months. Remove rugs, carpeting, stuffed animals, and fabric-upholstered furniture as cat dander adheres to soft furnishings. Vertical surfaces, such as walls, also collect cat dander. House cleaning should include washing the walls at several month intervals.