Been using Sensodyne for years for sensitive teeth. Occasionally switched brands. New tube of Sensodyne Full Pro Protection plus Whitening 3 weeks ago. First knew something was wrong when my lips began to feel allergic reaction with a swelling, tingling sensation...followed by severe itching, burning, redness and peeling on both sides of my chin. Miserable burning on face similar to extreme sunburn or chemical burn. Ended up at the Dermatologist on 7 day course of Prednisone and Desonide ointment. Stopped Sensodyne immediately.