Allergies are a common health issue for millions of people around the world. While many are aware of common allergens like pollen, mold, and animal dander, there are many other lesser-known allergies that people may experience.

Identifying these allergies and taking steps to avoid them can help to prevent uncomfortable and potentially dangerous symptoms. Here are 20 common allergies that you may not be aware of.

1. Nickel Allergy

Nickel is a metal that is commonly used in jewelry, zippers, and other clothing fasteners. Some people are allergic to nickel and can develop a rash or other skin irritation when exposed to it.

2. Sunscreen Allergy

While sunscreen is essential for protecting your skin from the harmful effects of the sun, some people are allergic to the chemicals used in these products. Symptoms of a sunscreen allergy can include a rash, itching, or swelling.

3. Latex Allergy

Latex is a natural rubber that is used in many products, including gloves, balloons, and condoms. Some people develop an allergic reaction to latex, which can cause symptoms such as hives, itching, or difficulty breathing.

4. Dust Mite Allergy

Dust mites are tiny insects that live in household dust. For people with dust mite allergies, exposure to these insects can cause symptoms such as sneezing, runny nose, or itchy eyes.

5. Soy Allergy

Soy is a common ingredient in many processed foods, including baked goods, meat products, and snack foods. Some people can develop an allergic reaction to soy, which can cause symptoms such as hives, swelling, or difficulty breathing.

6. Fragrance Allergy

Fragrances are used in many personal care and household products, including perfumes, shampoos, and cleaning products.

Some people may experience an allergic reaction to these fragrances, which can cause symptoms like hives, itching, or difficulty breathing.

7. Banana Allergy

Bananas are a popular fruit, but some people can develop an allergy to them. Symptoms of a banana allergy can include itching, swelling, or difficulty breathing.

8. Shellfish Allergy

Shellfish, such as shrimp, lobster, and crab, are a common food allergen. For people with a shellfish allergy, exposure can cause symptoms like hives, swelling, or difficulty breathing.

9. Wheat Allergy

Wheat is a staple in many diets, but some people develop an allergic reaction to it. Symptoms of a wheat allergy can include hives, difficulty breathing, or an upset stomach.

10. Corn Allergy

Corn is used in many processed foods and can be difficult to avoid. For people with a corn allergy, exposure can cause symptoms such as hives, swelling, or difficulty breathing.

11. Petrolatum Allergy

Petrolatum is a common ingredient in many lip balms and lotions. Some people develop an allergic reaction to petrolatum, which can cause symptoms like itching or rash.

12. Cinnamon Allergy

Cinnamon is a popular spice, but some people can develop an allergy to it. Symptoms of a cinnamon allergy can include hives, itching, or difficulty breathing.

13. Garlic Allergy

Garlic is used in many different types of cuisine, but some people may develop an allergy to it. Symptoms of a garlic allergy can include hives, swelling, or difficulty breathing.

14. Alcohol Allergy

While rare, some people can develop an allergy to alcohol. Symptoms of an alcohol allergy can include hives, difficulty breathing, or swelling.

15. Avocado Allergy

Avocados are a popular food, but some people can develop an allergy to them. Symptoms of an avocado allergy can include itching, swelling, or difficulty breathing.

16. Apple Allergy

While apples are a healthy snack for many, some people can develop an allergic reaction to them. Symptoms of an apple allergy can include itching, swelling, or difficulty breathing.

17. Black Pepper Allergy

Black pepper is a common spice, but some people may develop an allergy to it. Symptoms of a black pepper allergy can include hives, itching, or difficulty breathing.

18. Tea Allergy

While uncommon, some people can develop an allergy to tea. Symptoms of a tea allergy can include hives, difficulty breathing, or swelling.

19. Tomato Allergy

Tomatoes are a delicious ingredient in many dishes, but some people may develop an allergy to them. Symptoms of a tomato allergy can include hives, itching, or difficulty breathing.

20. Chocolate Allergy

For chocolate lovers, an allergy to this sweet treat can be especially challenging. Symptoms of a chocolate allergy can include hives, itching, or difficulty breathing.