Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This caused me incredible pain

I am a chronic pain sufferer so I decided to try Sombra Warm Therapy gel after it being recommended to me. I wish I'd never tried it. I put it on exactly as the directions say and it really burned. Even though I gently tried to wipe it off, it didn't make the burning go away any sooner. The stuff lasts what seems like forever, it didn't stop burning for hours. It hurt so bad I cried. I would rate this product without any stars if I could.