Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Just For Men beard and mustache

Be VERY careful. One use and I have severe burn and itching that has lasted days!! I rinsed in shower before the directed 5 minutes and am now sorry I tried this product. I agree, a class action suit may be necessary here. Pre-use skin test is not sufficient and this stuff is absolutely dangerous!!!! Plus, the "light brown" turned my beard black, which is not my hair color.