Follow the instructions or treatment presets provided with your specific Infraredi device.
For many Infraredi treatments, a session of approximately 10 minutes per treatment area is recommended. Some products or presets may use a different session length, so always use the guidance for your particular device.
Using the device for 20 minutes is not considered dangerous when it is being used correctly. However, longer sessions do not necessarily provide better results. After approximately 10 to 15 minutes, the body may already have absorbed the useful amount of light for that session, so additional time may provide less benefit.
Consistency is generally more useful than making individual sessions longer. If your device has a Presets menu, select your treatment goal and allow the device to apply the recommended treatment settings automatically.