In laser/light therapy – also known as intense pulsed light therapy – a hand-held device applies flashes of light to the skin in the treatment area. Sometimes a cooling spray, air or gel also is applied. Patients may feel a tingling or stinging sensation, but discomfort is generally minimal. Multiple treatments are needed in some cases, usually over monthly intervals. Treatments can last anywhere from 10 minutes to an hour, depending on the size of the treatment area.