Many things trigger allergies. The most common being dust. The others include pollen, mold, animals, insect stings, certain foods, etc. Almost anything around in the environment can be an allergen.
Here are some common/everyday things that could cause allergies.
Dust mites are microscopic critters that feed on dead flakes of human skin. Their feces carry enzymes that can cause allergic reactions such as sneezing, a runny nose, itchy eyes or eyes could water.
You could have a mild reaction, like an itchy skin from these latex gloves or condoms.
Mold is a common household allergen. People forget to check or clean their plants which has mold coming from leaves or overwatered soil, releasing them into the air. Inhaling these can lead to trouble in breathing, coughing and eye or throat irritation.
A chemical preservative called methylisothiazolinone (MI) is now replaced with preservatives such as paraben and formaldehyde. This preservative is present in baby wipes and other pre-moistened personal hygiene wipes cause rashes and allergies.
The irony here is when you get a bite on your leg and it itches like crazy, you apply some anti-itch cream and the next day the itching is worse, so you go on adding more and more cream. As it turns out, you are allergic to that cream. Same goes with antibiotic creams. This contains neomycin which is a potential allergen.
Some people are allergic to certain medicines, such as penicillin or aspirin. Symptoms can range from a mild reaction like a skin rash a few days after you start a drug to a severe and immediate reaction.
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