Good news is it's nothing serious.
Yes, I have had this problem before.
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Is It Sinusitis?
However, if you experience a runny nose while being active outdoors, the cause may be more realistically related to allergies, cold weather, or another irritant.
While crying, more tears flow through the lacrimal puncta into the nasolacrimal duct.
I find that when I am that close and sharing the same breathing air my nose gets congested and runny.
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I sneeze a lot and my nose becomes blocked after having sex.