Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Severe Rash after Using Cottonelle Fresh

First let me say I'm not a doctor. I can only tell you my experience. I developed a severe rash after switching to this brand. I can't prove that this was the cause, or that it would cause the same problem with everyone. I can only say that this was the only change in my personal routine before the rash began. Please search the net for article from Mayo Clinic about methylchloroisothiazolinone or MCI for a more intelligent discussion on the topic. If you have sensitive skin I really suggest you be careful before choosing this product.