Allergies are mostly inherited and passed on to generations. Around 50 million Americans suffer from some form of allergy every year. Allergies cause sneezing, runny nose, itching, or/and swelling depending on the type.
Allergies are triggered due to:
Rhinitis is caused by indoor or outdoor allergens and can cause swelling and inflammation of nasal passage, congestion, sneezing, and watery eyes.
Some people are allergic to certain foods such as peanuts, milk, soy, etc. Food allergies can cause Anaphylaxis which can be mild to life-threatening.
Allergies developed by the sting of certain insects cause Anaphylaxis and is one of the most dangerous types of allergy if not treated immediately.
Pollen causes seasonal and mild allergies with a runny nose or nasal stuffiness. Dust mites on pillows, carpets, etc. can cause similar allergies to pollen.
This allergy is the immune system's reaction to certain medicines. The most common symptoms include hives, rash, or fever.