I have used it up to 3 or 4 times in a day to clean out the sinus cavities during cold, flu, and allergy seasons. Typically with a cold, nasal discharge is clear, fever is absent and symptoms begin to improve in about three days. When bacterial sinus infection complicates a cold, symptoms persist and worsen. Postnasal drip can lead to a sore throat or cough. I am not a doctor and my best medical advice would be if you suspect you have an infection, please see your doctor.
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