As an expert in skincare ingredients, I can provide some insights on how to determine if you are allergic to argan oil. Allergies to argan oil are relatively rare, but they can still occur. Here are some signs to look out for:

1. Skin Irritation: If you apply argan oil to your skin and notice redness, itching, or a rash, it could be a sign of an allergic reaction. Pay attention to any changes in the appearance or feel of your skin after using the oil.

2. Swelling: Allergic reactions can sometimes cause swelling, particularly around the areas where the product was applied. If you notice any puffiness or swelling after using argan oil, it may indicate an allergy.

3. Difficulty Breathing: In severe cases, an allergic reaction to argan oil may cause difficulty breathing or shortness of breath. If you experience any respiratory symptoms after using the oil, seek medical attention immediately.

It's important to note that these symptoms can also be caused by other factors, such as skin sensitivity or irritation. If you suspect an allergy to argan oil, it's best to consult with a dermatologist or allergist for a proper diagnosis. They can perform tests, such as patch testing or skin prick tests, to determine if you have an allergy to argan oil or any other specific ingredient.