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

Tuli's Heavy Duty Gel Heel Cups, didn't work for me. I have heel pain and when I put a heel cup in my shoe it hurt even more. I need to go to an MD to find out what the pain is from. People keep telling me it's a heel spur, but I don't think so. #1 go to a Doctor first before buying them.