Not much: It may be helpful in very dry environments but seldom makes much difference. Nasal congestion is aggravated by dust/fumes/smoke/irritants & removing them from their sleeping area does the most good. Actively washing out their nasal passages with saline give short term benefits.
Answered 8/5/2019
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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