Sources have said it may be because of too much air conditioning in the private jet he took to the Packers' camp this weekend.
The worst part is that he has been without Kleenex for the whole day.
However, according to sources, toilet paper may have been used as a substitute for the lack of Kleenex in Favre's room.
Reporters first learned of this story Monday night, despite Mike McCarthy's press conference being cancelled.
Neither Brett or wife Deanna were available for comment.
ESPN has dispatched both Ed Werder and Wendi Nix to find the truth behind these reports. The network has also announced that they will cover this developing story in a five-hour SportsCenter special tomorrow, starting at noon eastern time.
Hopefully by then, Favre will be available to address what is going on in his nose.