Thank you for getting in touch about our Old Spice High Endurance Aluminum Free Pure Sport Deodorant. We are very sorry to hear that you developed a chemical burn and rash. That's truly not the kind of experience we want you to have and we understand how devastating this can be. We'd like to make sure that your comments get the attention they deserve so we'd like to gather more information about your experience. You can be assured that the details you provide will be shared with our Health and Safety Team, as well as the rest of our Old Spice Team. Safety is our top priority and all of our products have been thoroughly tested to be safe when used as directed. While all our ingredients are thoroughly evaluated to be safe and effective when used as directed, we recognize some people may have personal sensitivities and cannot tolerate a particular ingredient or formulation. We do recommend discontinuing the use of the product if you haven't already but please keep it on hand in the event we may need to retrieve it. We would really appreciate it if you would contact us at (800) 677-7582 or email us through our Contact Us Page so we can assist you further.