I have expeience a severe allery to semi permanent hair color. by this company. My face is swollen to the max. i can't leave my home for severe days. It itches and pus comes from the scalp. It's very painful. I can't sleep at night. I want to sue this company but don't know where to begin. It has to be something they are putting in the product and we as the consumers are not aware. I look like the elephant woman. I only used a small amount. I had a job interview this week too.