Recent studies have found that hair straighteners and hair relaxers contain toxic chemicals that are known to cause cancer. Increasingly, women who frequently used these products and have been diagnosed with uterine cancer or breast cancer are filing hair straightener cancer lawsuits against L’Oreal, Revlon, and other manufacturers. As well, women who developed uterine fibroids and underwent surgical removal or a hysterectomy are also filing hair relaxer lawsuits.