Instruct: Classify an Amazon review into positive or negative sentiment.
Query: This product is a scam.

Yes, this product is a scam. It is no better than a cotton ball, because the fiber is very harsh. There is no medicine to stop the bleeding. A month later when you have a nose bleed and find out the scam, it is too late to return the product. So do not buy it. Amazon should take this product out of its site.