Confusing question: The information you provided is not helpful.There is no particular link between mouth irritation and the need for oxygen. Your 3 mo seems to have a lung/respiratory problem and the more common at that age include pneumonia or bronchiolitis. Both can cause a baby difficulty in breathing and a need for oxygen, care is supportive and includes IV fluids, oxygen and other treatments depending on the c.
Answered 6/10/2014
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