This is the question we're asked most often. The honest answer: it depends on what you're feeling, and there's no rule that works for everyone.
Here's what you need to make up your own mind.
What cold does
On contact with the skin, cold causes the surface blood vessels to contract. The area feels fresh, sometimes slightly numb.
When people generally prefer it:
- When the forehead or temples feel warm
- After long exposure to screens
- On waking, when eyelids are puffy
- In warm weather, or after exercise
- When you want an immediate, awakening effect
What heat does
Heat has the opposite effect: vessels dilate, local circulation increases, and muscles tend to release.
When people generally prefer it:
- When the dominant sensation is stiffness or tension
- In the evening, to prepare for sleep
- In winter, or when you feel cold
- When you want an enveloping, soothing effect
Quick reference
| Situation | Rather |
|---|---|
| Feeling of heat, heaviness | Cold |
| Stiffness, muscular tension | Warm |
| Puffy eyelids on waking | Cold |
| End of day, before bed | Warm |
| After exercise | Cold |
| Need to wake up | Cold |
| Need to unwind | Warm |
Alternating
Some people alternate: a few minutes warm, then a few minutes cold. It's a pleasant experience and helps you work out what suits you best. Start with short sequences.
Precautions, in both cases
They're simple but important.
- Always check the temperature on the inside of your wrist before applying to your face. The skin around the eyes is thin and sensitive.
- Never straight from the freezer. Let it warm up for a few minutes.
- No microwave, no boiling water, unless the guide supplied says otherwise.
- Fifteen to twenty minutes is enough. Longer adds nothing.
- Never on broken, irritated or sensitised skin.
- Remove immediately if anything feels uncomfortable.
Why a mask rather than an ice pack
An ice pack slides around, covers only part of the area, and its direct contact is often too harsh. A mask follows the contours of the face, spreads the temperature evenly from forehead to temples, and blocks out light — which often matters as much as the temperature itself.
ThéraMask™ was designed for both uses, with a gel that stays supple when cold and a fabric that's soft to the touch.
ThéraMask™ is a comfort and relaxation accessory. It is not a medical device. If discomfort persists or you have a health condition, speak to a healthcare professional.