Environmental Control for Indoor Allergens

House dust contains a variety of allergens such as insect parts, animal dander, and dust mites. Furthermore, mold may also be present in homes. It is important to eliminate as much allergen as possible from the home in order to derive maximum benefit from your treatment.

House Dust Mite is probably the most important allergen in most homes. Controlling house dust mite exposure will decrease symptoms in allergic patients and may decrease the risk of developing dust mite allergy in patients not yet sensitized. Dust mites are tiny microscopic creatures that thrive in warm, moist climates. Upholstery (particularly the bed) is the ideal habitat for dust mites because they need the protection of the padding and a food supply (shed human skin) to survive. They cannot thrive on non-porous surfaces or in cool dry climates.

There are simple things you can do to minimize dust mite exposure:

You should concentrate on the bedroom (particularly the bed) because this is where you spend most of your time. In fact, when you are sleeping, you are breathing with your mouth and nose inches from a whole army of dust mites. The bedroom should be clutter free.

Dusting should be done frequently with a damp cloth.

The humidity in the bedroom should be kept below 50%. In Central Oklahoma this generally requires only air condition, but may require a de-humidifier. Humidifiers encourage dust mite and mold growth and should be avoided.

The mattress, box spring and pillow should be encased in dust mite proof encasements. All items on the bed should be washed in hot water (140 degrees) every one to two weeks. Stuffed animals should be removed from the bed.

Upholstered furniture and wall to wall carpet contain dust mites and should be avoided if possible, but these are not nearly as important as the bed.

Air filters, expensive vacuum cleaners, and duct cleaning help only minimally. When vacuuming, a HEPA filter or double bag should be used to minimize dust mites being stirred up and released into the air.

Cockroaches are now recognized as important indoor allergens. Other insects such as lady bugs, spiders, and crickets have recently been implicated. Keep the home clean and dry and fix any leaks or drips. It may be necessary to have an exterminator treat the home periodically.

Animal dander, generally from cats and dogs (but sometimes from gerbils, hamster, guinea pigs, mice, etc.) is a very important source of allergen in dust. Contrary to popular belief, animal hair is not the problem. Rather, it is a protein in the urine, saliva and dander of animal that provokes allergy. There are no “nonallergenic” furred pets. Some individual animals produce more allergen than others but there are no “safe” breeds.

The best thing you can do if you are allergic is to eliminate the pet.

Keeping the animal outside is only a partial solution because people who handle the animals outside will bring the allergen in on their clothes.

If you cannot eliminate the pet, try to keep the pet in non-upholstered areas and never let the pet in the bedroom. A HEPA filter in the bedroom may provide some protection.

Bathing the animals weekly may decrease the amount of allergen they produce.

After the animal has been removed, it can take as long as a year for allergen levels in the home to drop significantly, so a good thorough cleaning of the home is necessary after eliminating the animal.

Recently some information has come to light which suggests that if you are not already allergic it may actually be helpful to have cats or dogs in the home. However, if you are already pet allergic having the pets around will only worsen your allergic symptoms.

Indoor Mold can also cause significant allergic respiratory symptoms. Homes with high humidity and/or leaks have a high likelihood of having significant indoor molds. Once these issues have been fixed, it is generally easy to eliminate molds, but if you continue to have problems with water leaks or high humidity, you will have a hard time cleaning up your mold. Use a cleaning solution containing 5% bleach and a small amount of detergent to clean up moldy areas. Performing house dust control measures will help as well.

Itchy Eyes

Have your eyes been itchy and driving you crazy? It might not be what you think it is. Allergic conjunctivitis with hay fever, dry eye, pink eye or blepharitis could lead to wrong treatment and side effects.

With an estimated 50 million white blood “mast” cells, the eye can sense irritants and release histamine and other substances to defeat the irritants. Histamine stimulates eye nerve endings which irritates the eyes causing the itch.

Approximately 50 million people in the U.S. have allergies. Some are allergic to environmental triggers but the majority experience symptoms when grass, pollens and mold are in the air. Common allergens include pollen, dust mites, ragweed, mold, pet dander, perfumes, smoke and some fragrances or cosmetic ingredients.

When allergies target the eyes, the condition can be miserable. Eye conjunctivitis may get treated as part of a nasal allergy or it can be mistaken for other serious conditions like infectious conjunctivitis also known as pink eye, dry eye disease, blepharitis (inflammation of the eyelids), herpes virus or keratitis (corneal ulcer).

Making these distinctions is critical to ensuring the proper treatment is diagnosed, to quickly reduce the symptoms and reduce the potential risk of harm to the eyes. The American College of Allergy, Asthma and Immunology (ACAAI) warns that extended use of some nasal allergy medications can leave allergic eyes drier and even more irritated.

Usually if the eyes are itchy and watery, it’s probably an allergy with intense itching with tearing and redness.

Seasonal Allergic Conjunctivitis

Most of the eye allergies in the U.S. are seasonal conjunctivitis occurring in the spring, summer and fall. Symptoms include dark under the eye circles, light sensitivity and puffy eyelids.

Perennial Allergic Conjunctivitis

This condition is where eye allergies occur year-round but commonly caused by household/workplace irritants, dust mites, mold and pet dander. The symptoms are the same as seasonal conjunctivitis but usually less severe.

Vernal Keratoconjunctivitis

This year-round condition and worsen during pollen seasons and targets boys, young men, and people with asthma or eczema. Symptoms include the feeling of something in your eye and light sensitivity.

Atopic Keratoconjunctivitis

Another year-round atopic (sensitive to allergens) keratoconjunctivitis, this strikes older men who have allergic dermatitis (an immune reaction in the skin). Symptoms are eye burning and a thick mucus that accumulates on eyelids overnight.

Contact Allergic Conjunctivitis

Direct contact with potential allergens such as eye drops with preservatives can lead to this reaction. Symptoms can also cause discomfort wearing contact lenses and mucus discharge.

Giant Papillary Conjunctivitis

This severe condition leads to fluid sacs (papules) forming in the upper eyelid lining. Doctors can see them by turning the lids inside out. Other symptoms include blurry vision from mucus discharge, foreign body sensation, discomfort wearing contacts and a sense that contacts are moving, puffy or droopy eyelids.

What else could it be other than an eye allergy?

Pain in the eye or diminished vision are serious symptoms not typical for allergies. Dry Eye Disease (DED) allergy and DED are very similar. Pink eye causes red, painful eyes indicating infection of inflamed conjunctiva. Pink eye is very contagious and usually begins in one eye and generates a sticky secretion that coats the lashes. A swollen lymph not by the ear may also appear.

Pollen clogged tear grands can resemble blepharitis, a disorder of the eyelid’s oil producing glands. It can almost always be infectious and symptoms include irritation, redness, flaky eyelid skin and crusted lashes.

Karatitis is the inflammation of the cornea, and symptoms include redness, pain, watering, blurry or decreased vision and rarely itchiness. Herpes eye disease can lead to pain, tearing, redness, light sensitivity, and a skin rash or sore near the eye. Observation or special blood tests can confirm this disease.

Other itchy conditions include contact dermatitis, atopic eczema and psoriasis all have itching on the eyelid or the skin around the eye.

Prevention

Avoid a known allergen
Protect eyes with sunglasses, visored hats and swimming goggles
Wash hands when coming indoors (especially after handling animals)
Wash your face to clean off allergens
Soothe eyes with a cold compress
Try preservative free tear substitutes
Consider mite-proof bedding
Wash sheets and blankets in hot water weekly
Check for and eliminate mold by regularly cleaning the areas of your home where moisture may accumulate (base of the toilets, closets, mudrooms, HVAC filers, water filters, windowsills and gutters
Use air conditioning in your car and in your home
Leave your shoes at the door

Avoidance

Eye drops with herbal extracts
Eye products using preservatives
Window fans that draw in allergens
Indoor humidity exceeding 50 to 50 percent to discourage mold
Dry dusting or sweeping floors and spreading allergens
Wearing contact lenses too long
Rubbing eyes

If you think you might have an eye allergy, discuss this with your OAAC provider. There are many types of drugs and treatments available. Your OAAC allergist can find the right mix of medication and treatment to defeat the eye allergy itch.

The post Itchy Eyes appeared first on Oklahoma Allergy and Asthma Clinic.

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Environmental Control for Indoor Allergens

Environmental Control for Indoor Allergens

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