I was a little nervous about trying this product it contains capsaicin pepper.But after reading up on it and reading the testimonials I was so curious to try it in hopes it would bring relief to my stuffed up nose.They do say there will be a slight tingling burning sensation that will pass.After trying it I was shocked at the results it cleared my sinuses and my headache was instantly gone.I love that its natural and no synthetic chemicals are in it.They also guarantee money back if it doesn't bring you relief.