Exact causes, as to why allergy occurs due to a common substance in few and not in others are unknown. Though, it is believed that immune system fails to recognize common substances as harmless and starts reaction against them. But why this happens is not known. Certain factors or substances which can trigger allergic reactions are listed below-
- House hold dust: Dust mites, house dust, moles, pollens (from tree, grass or weeds), animal hair, fur, insect bites, bee stings, tree pollen, smoke, pollutants, strong smell, cockroaches.
- Medicines: penicillin, ibuprofen, sulpha drugs.
- Food: Common food items which are culprits in triggering allergic reaction are peanuts, cow milk, soy products, eggs, fish, shellfish (seafood), nuts (pecan, pine nut, walnut, pistachio etc) , cheese, sesame seeds.
- Latex: Latex can trigger allergic reaction in some people. Healthcare workers are more likely to get this type of allergy due to latex gloves. It can cause skin symptoms like rashes or allergic contact dermatitis.