Allergies are reactions that often occur when the immune system comes into contact with certain substances. While there are some allergy triggers that are well-known, such as pollen or pet dander, there are others you may not expect.

Here are ten unexpected things that can trigger allergies:.

1. Fragrances in Household Products

Fragrances in household products such as air fresheners, cleaning solutions, and detergents can cause allergic reactions in those with sensitivity to specific chemicals. Effects can range from rashes to respiratory distress.

2. Alcohol

While allergy to alcohol is rare, it can happen. Sulfites, the preservatives commonly added to wine, beer, and spirits to extend their shelf life, can cause allergic reactions in some people.

Allergic reactions can include hives, difficulty breathing, and anaphylaxis in severe cases.

3. Sunlight

Photosensitivity is a condition where certain chemicals in the body cause an allergic reaction when exposed to sunlight. Common symptoms include skin rashes, itching, or hives.

4. Berries

While berries are generally considered to be healthy, they can cause allergies in some people. Berries such as strawberries, raspberries, and blueberries contain a protein called Fra a1 that can induce allergy.

Symptoms may include hives, swelling, and itching.

5. Pet Food

Allergies to pet food can happen, particularly when the food is made of fish or other common allergen sources. Symptoms may range from skin rashes to vomiting and diarrhea.

6. Exercise

While exercise is usually seen as a positive thing, it can cause allergic reactions in some people.

Exercise-induced anaphylaxis is a condition where a person experiences symptoms such as hives, stomach cramps, and difficulty breathing after exercising.

7. Fish

Fish, particularly shellfish, can cause severe allergic reactions in some people. Symptoms may include hives, difficulty breathing, and anaphylaxis.

8. Perfume/ Cologne

Like household fragrances, perfume and cologne can also trigger allergic reactions. People who are sensitive to fragrance chemicals may experience symptoms such as rashes, respiratory distress, and even migraines.

9. Touching Coins and Money

Although it may seem unusual, certain metals in coins and money can cause allergic reactions in some people. People with nickel allergies may experience symptoms such as skin rashes, redness, and itching.

10. Emotional Stress

Emotional stress can cause an allergic reaction, particularly in people with an autoimmune disease or a history of allergies. Stress can affect the immune system, leading to an overreaction when the person is exposed to allergens.