I saw the question Can You Randomly Get Hay Fever? being asked in Google, so I thought I would address this exact question. In actual I have already really answered this question in my post Can Adults Suddenly Develop Hay Fever? but I wanted to address it directly.
Can You Randomly Get Hay Fever?
The short answer is yes. You can become allergic to pollen at what might seem a random time. The truth is, although most people start suffering from hay fever when they are children, you can, in fact, start suffering from hay fever at any time, as a child or as an adult.
Although hay fever is usually assumed to begin in childhood, some adults will be getting a nasty shock as they experience unpleasant symptoms such as sneezing and itching for the first time.
Which is a quote I reference in the linked post. I know this is a short post and short answer but the truth is, to this question, the answer is short and to the point – Yes you can get hay fever at what seems like random.
The question should be, how can I tell if its hay fever
So, if you’re asking the question about randomly getting hay fever, you may also what to know the difference between hay fever and a cold. Could it be a summer cold you are experiencing or is it, in fact, hay fever? As it happens I also have written another post called Tell The Difference Between Hay Fever And A Cold which addresses this exact question. So, you may want to take a moment and check out that post too. I hope it helps.