Riehl melanosis treated successfully with Q-switch Nd:YAG laser.

Riehl melanosis is a rare cause of skin hyperpigmentation that typically occurs on the face and neck and is characterized by the rapid onset of gray-brown reticular pigmentation. It is theorized to be a pigmented contact dermatitis or a lichenoid immune reaction that may be caused by intrinsic as well as extrinsic factors. Treatment is challenging; laser and intense pulsed light (IPL) therapy is a common treatment for other pigmented skin conditions. IPL has been reported twice for the treatment of Riehl melanosis and we report a case of Riehl melanosis successfully treated with q-switched Nd:YAG after proving recalcitrant to IPL treatment.