A few sneezes here and there might not seem like a big deal. But when you start sneezing repeatedly, develop a runny nose, or wake up congested, you may wonder whether you are dealing with seasonal allergies or the flu. Both can cause nasal symptoms, but sneezing is much more closely associated with allergies. The flu tends to cause a broader combination of symptoms, including fever, body aches, fatigue, and cough. So, how can you ...