Short answer: warmth feels comforting to many people, and non-ionizing energy such as infrared and microwaves can heat substances, so heat is an easy, familiar way to deliver a comfortable sensation.[1][2]
- Heat is a known effect. Non-ionizing radiation "can heat substances", and intense, direct exposure can cause tissue damage from heat, which is why use limits matter.[1]
- Comfort, not treatment. Many visitors tell us they find a gentle stream of warm air relaxing. That is their experience, not a medical result.[7]
- Why limits and controls exist: our devices have settings, timers or auto shut-off, and the Classic 3.0 is limited to up to 45 minutes continuous, then let it cool fully.
- Use care on numb skin or with a medical condition, and follow the manual.
When to see a doctor
See a doctor before using heat if you have numbness, diabetes, an implant or are pregnant.
Sources
- CDC, About non-ionizing radiation
- NASA Science, The electromagnetic spectrum
- Prife iTeraCare, How it works
Written by the Prife iTeraCare team and last reviewed on 10 October 2026. This is general information, not medical advice, and it does not replace your doctor or physiotherapist. A session is a wellness experience, not a medical treatment.
Book a free session and see iTeraCare for yourself at our Anna Nagar centre.
