I have just started using your product and I am now experiencing a numbness of my nose. When I rinsed yesterday – I got a dull headache that lasted al

If you used a hypertonic (double or triple strength) solution, it may have caused some burning or tingling in your nasal passages. This should not happen when you use one NeilMed Isotonic blue packet of mixture in 8 ounces of lukewarm water. Sinus rinsing should not cause headaches. It is possible you are fighting a low-grade sinus infection or cold.