I think it's a good idea to make sure your pores are kept clean and unclogged especially when allergens are really bad. Bliss Daily Detoxifying Facial Toner is a gentle protecting and purifying formula that smoothes, moisturizes and provides potent antioxidant protection against smoke, smog, and other environmental toxins (such as allergens). You can find this toner here: http://www.sephora.com/browse/product.jhtml;jsessionid=YZMUMHGQMQ0WACV0KQLQX0Q?id=P226707&categoryId...
This toner will also help to keep your pores clear of dirt, bacteria, makeup, etc., so it should help to prevent breakouts.
I hope this helps you.