What is brad paisley illness?

As an AI language model, I cannot guarantee the timeliness of the information I provide. As of my last training data available, there is no information about Brad Paisley being currently ill. However, in 2002, Brad Paisley was diagnosed with acute tonsillitis and had to cancel some shows. In 2007, he had surgery to remove a non-cancerous polyp on his vocal cords and subsequently canceled some shows. He also revealed in a 2015 interview that he suffers from seasonal allergies and asthma.