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Allergies happen when your immune system reacts to a substance that normally isn’t harmful and considers it a threat. Allergy symptoms can range from being uncomfortable to downright dangerous.

According to the American College of Allergy, Asthma & Immunology, as many as 50 million — or one in five — people in the Unites States has allergies.

The best treatment is usually avoiding the thing you’re allergic to. That goes for everything from aspirin to cats, peanuts to pollen. If your trigger causes breathing problems, you may need to carry an inhaler or an epinephrine auto injector to restore your airway in an emergency. These videos cover several allergy types, treatments, and tips to help you be prepared for bad reactions and in day-to-day life.

Feeling like you’re destined to have itchy eyes and a stuffy nose once the pollen comes out? There are lots of practical tips to help reduce your exposure to pollen during allergy season. This Buzzfeed video illustrates them with a bit of humor.

Seasonal allergies are becoming more and more common. This Vox videographic explores why people develop these allergies, focusing on the hygiene hypothesis. The theory says your body needs exposure to bacteria and allergens at an early age in order to develop healthy immune system functions, and not getting this exposure contributes to developing allergies.

Food Allergy Research & Education (FARE) is a nonprofit dedicated to improving the lives of people with allergies. FARE produced this video to teach people how serious a food allergic reaction can be and why it’s so important to be informed, especially in schools and communities. The video also explains the organization’s mission and how a parent or someone dealing with food allergy can get access to additional resources.

Dr. Oz explains the information your doctor uses to tell the difference between a cold and an allergy. He uses easy to understand visuals to teach you how to analyze your symptoms. If you’re having trouble telling the difference, his four clues can help.

Food allergies can be hard enough without unsolicited commentary. This funny Boldly video by Buzzfeed is a collection of all the ridiculous things people with food allergies hear from people who don’t have them. With so many scenarios presented, you’ll probably find something relatable if you deal with food allergies yourself.

Sonia Hunt, CEO of an interactive agency which creates mobile products for different industries, recounts her personal experiences with food allergies in this TED Talk. She recalls being taken to the emergency room 18 times due to her food allergies. But she didn’t give up. She focused on educating herself and learning to prepare her own food. Hunt explains how the American food landscape has changed and why everyone — not just people with allergies — should know what’s in their food.

Allergist Dr. Stanley Fineman talks about fall allergies, what causes them, and what you can do if you have them. The CNN news segment follows a couple of people to their doctor visits and provides tips to avoiding allergens.

You don’t expect to develop a food allergy after a tick bite. However, experts are finding this isn’t only possible, but becoming more common. This NBC Nightly News report investigates the lone star tick and the science behind why the bite causes a meat and dairy allergy. One women affected by it also shares her story.

Changing seasons can be delightful for some, but miserable for those with seasonal allergies. TED-Ed presents an educational videographic that explains how your immune system works and its involvement in seasonal allergies. If you’re itching to know why you have allergies and what your body is doing during a reaction, this video will tell you.

Seasonal allergies can be uncomfortable and annoying, and sometimes, so are comments about them from the people around you. Boldly by Buzzfeed presents a humorous take on how it can feel to have season allergies in social settings. If you have allergies, you can probably relate.

This straightforward how-to video by Howcast presents a variety of natural remedies for allergy relief. The video goes through nine steps, each focusing on a different remedy, along with how to use it and why it works. Remedies presented are geared toward reducing sneezing, itching, and nasal congestion.

Parents and their children with severe food allergies share their experiences in a trial program designed to treat their allergies. The video, produced by FARE, explains how the program works and how it’s changing the way food allergies are treated. Both children in the program experience a reduction in the severity of their allergies, giving hope that others can benefit as well.

List25 explains 25 common allergies, from pollen to medications to beauty products. The list counts down from 25. For each allergy, the host presents a photo and a few facts and statistics.

The body and immune system are complex. Humans can be allergic to all sorts of things, including water and the sun. Seeker’s DNews explores five of the strangest allergies and the host tells a few stories about people who live with them.