According to the Asthma and Allergy Foundation of America (AAFA) the top 5 worst places in America for allergy sufferers are as follows:-

1. Knoxville, TN
2. McAllen, TX
3. Louisville, KY
4. Jackson, MS
5. Wichita, KS

The primary springtime allergy trigger is tree pollen, and it can cause symptoms including itchy runny nose, nasal and sinus congestion, repeated sneezing, watery eyes, inflamed sinuses and, in severe cases, difficulty breathing.