Instruct: Classify Amazon reviews into positive or negative sentiment
Query: didn't worked for me

I had swollen and bleeding gums, thought it would work based on some reviews for this product. Unfortunately, my swollen gums kept progressing and worse, when sores started coming out, felt stinging burn every time I used this product. So I switched to another brand and boy, what a difference, no stinging burn and my gums looked and feel better now.