Safety
Safety, and who it's not for
Simple ways to use warmth, massage and support safely, in plain English.
Call 911 right away if pain in your shoulder, arm, neck, jaw or back comes with chest pressure, shortness of breath, a cold sweat or nausea. Or if one leg is suddenly swollen, painful and red and you’re short of breath.
Don’t use our devices if
- The skin there is broken, burned, healing or has a rash.
- You have reduced feeling there, like diabetic neuropathy, unless your clinician says it’s okay.
- You have a known or suspected blood clot, or cancer in the area.
- You had surgery there and haven’t been cleared yet.
- You’re pregnant: no heat, pressure or pulses on the belly or lower back.
When in doubt, ask your doctor first. We’ll happily wait.
Using heat safely
- Start on the lowest level, over clothing.
- Check your skin after 5 minutes. Stop if it burns or blisters.
- About 15 minutes is enough. Never fall asleep with it on.
- Move it a little each day. The same spot for months can mark the skin.
Device by device
The Neck Rest (gentle pulses)
Never use the pulse mode with a pacemaker or other implant, or with epilepsy or a heart condition. Back of the neck only. It starts off: turn it up slowly, and stop if you feel dizzy.
The Knee Wrap and Back Belt
Not on a leg that might have a clot. Ask first if you take blood thinners or have poor circulation. Back Belt: tighten, then inflate, 30 to 60 minutes at a time, never to sleep. Ask first if you have a hernia or recent spine surgery.
The Shoulder Wrap
Start on Low (about 104°F at the heater) over a T-shirt, and check your skin after 5 minutes. Diabetes or reduced feeling in the arm? Stay on Low. Overheat protection is built in. After about 15 minutes, hold the power button for 3 seconds to switch it off.
The Seat Support
Fit it before you drive, never while moving. Keep seat controls, seatbelt and side airbags clear. Stop every couple of hours to stretch.
Diabetes, thin skin or a new joint
Lowest setting, over clothing, and check your skin often. After a knee or hip replacement, wait until your surgeon clears you.
See a doctor first if
- You can’t put weight on a joint, or it locks, gives way or looks different.
- A joint is hot, red and swollen, or you have a fever.
- Pain down a leg or arm is new or getting worse, or comes with new numbness or weakness.
- Pain started after a fall, or keeps getting worse.
Go to the ER for numbness in both legs or around your bottom, or new trouble controlling your bladder or bowels.
Not sure it’s right for you? Write to us. If the answer is “not right now”, we’ll say so.
Reviewed by Dr. Anna Whitfield, PT, DPT · October 2026 · General information, not medical advice.