Water irrigation: sinus and allergies

Patient: While doing a water irrigation for my chronic sinus and allergy issues, i some times feel a chill, my eyes are watery and there is a nasal drip. after about an hour it seems that everything settles down and the symptoms that just explained, seems to subside. i was wonder was this an indirect responds from my body as the allergen is being extracted from my nasal passages by the irrigation. i do not feel this only while i am irrigating my sinuses. this occurs also when i don.t blow my nose and just let my nostril drain.

Symptoms: Chills, watery eye and a nasal drip