Your doctor may test your blood for low levels of vitamin D, which are associated with nasal polyps.Ĭhronic sinusitis, with or without polyps, is a challenging condition to clear up completely. The standard diagnostic test for cystic fibrosis is a noninvasive sweat test, which determines whether your child's perspiration is saltier than most people's sweat is. If you have a child diagnosed with nasal polyps, your doctor may suggest testing for cystic fibrosis, an inherited condition affecting the glands that produce mucus, tears, sweat, saliva and digestive juices. If a skin test can't be performed, your doctor may order a blood test that screens for specific antibodies to various allergens. Your doctor or nurse then observes your skin for signs of allergic reactions. With a skin prick test, tiny drops of allergy-causing agents (allergens) are pricked into the skin of your forearm or upper back. Your doctor may suggest skin tests to determine if allergies are contributing to chronic inflammation. These studies may also help your doctor rule out other possible blockages in your nasal cavity, such as structural abnormalities or another type of cancerous or noncancerous growth.Īllergy tests.
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