Can allergies cause rash and itch only on one side of face?

It's possible for allergies to cause a rash and itch on only one side of the face. This can be due to a number of factors, including:

- Contact allergy: This type of allergy occurs when you come into contact with an allergen that triggers an allergic reaction. If the allergen only comes into contact with one side of your face, you may only develop a rash and itch on that side. Common contact allergens include:

- Nickel

- Rubber

- Fragrance

- Cosmetics

- Atopic dermatitis (eczema): This chronic skin condition can cause dry, itchy, and inflamed skin. It can affect any part of the body, including the face. Eczema may be more likely to develop on one side of the face if you have a family history of allergies or asthma.

- Allergic rhinitis (hay fever): This condition causes sneezing, a runny nose, and itchy eyes. It can also cause a rash and itch on the face, including the cheeks, nose, and forehead. If you have hay fever, you may only develop symptoms on one side of your face if you are exposed to the allergen on that side.

If you are experiencing a rash and itch on only one side of your face, it's important to see a doctor to determine the cause and get the appropriate treatment. The doctor may recommend avoiding potential allergens, using over-the-counter or prescription medications, or undergoing allergy testing to identify the specific allergens that are triggering your symptoms.