There are also some simple nutritional and natural methods of relieving allergies which work best in conjunction with the mainstream medical methods.
Taking plenty of vitamins and other nutritional supplements, particularly Vitamin C, Zinc, Selenium, and B Complex, builds up a natural defense against allergic invaders.
Drink plenty of water to flush out your sinuses and eat foods to which you are not sensitive (a food sensitivity test like the ELISA test can help determine your food triggers).
Keep your home dry and uncluttered with plenty of circulation to avoid mold and dust, and keep houseplants to a minimum and away from the main rooms.
If you have animals, do not allow them on the bed. Wash your bedding AT LEAST once every 2 months and keep the bedroom the cleanest of all, as it is during sleep that our immune systems recharge.
Exercise frequently and get plenty of undisturbed rest.
Avoid sugar, which lowers the immune response and triggers Candida (yeast) overgrowth, a condition that contributes greatly to allergies.
You may also use homeopathic remedies during the times when your allergies are at their worst. Garlic, cayenne, turmeric, and thyme are all good herbal supplements for allergy sufferers, as they bolster the immune system and fight yeast.
It's also important to remember that milk (be it cow's milk, soymilk, rice milk, goat's milk, etc.) thickens the mucus and can lead to congestion.