About This Source - Sky News
Sky News is a British free-to-air television news channel and organisation. Sky News is distributed via a radio news service, and through online channels. It is owned by Sky Group, a division of Comcast. John Ryley is the head of Sky News, a role he has held since June 2006.
Recent from Sky News:
50% of children now have an allergy, but scientists don’t know why. Here’s Callum; he’s four-years-old and has 12 allergies – six of which are life threatening. Sky’s Gemma Morris reports.
SUBSCRIBE to our YouTube channel for more videos: http://www.youtube.com/skynews
Like us on Facebook: https://www.facebook.com/skynews
For more content go to http://news.sky.com and download our apps:
In This Story: Allergy
Allergies are a number of conditions caused by hypersensitivity of the immune system to typically harmless substances in the environment. These include hay fever, food allergies, atopic dermatitis, allergic asthma, and anaphylaxis. Symptoms may include red eyes, an itchy rash, sneezing, a runny nose, shortness of breath, or swelling.
Common allergens include pollen and certain foods. Metals and other substances may also cause problems. Food, insect stings, and medications are common causes of severe reactions. Their development is due to both genetic and environmental factors.
Treatments for allergies include the avoidance of known allergens and the use of medications such as steroids and antihistamines. In severe reactions injectable adrenaline (epinephrine) is recommended.
Allergies are common. In the developed world, about 20% of people are affected by allergic rhinitis, about 6% of people have at least one food allergy, and about 20% have atopic dermatitis at some point in time. Depending on the country about 1–18% of people have asthma. Anaphylaxis occurs in between 0.05–2% of people.