The warming sensation typically begins a few minutes after the moistened plaster is applied to the skin. As the mustard powder works, this feeling will intensify to a noticeable, localized heat. For most adults, the plaster is designed for short-term use; leaving it on for more than 15-20 minutes is usually not necessary and may increase skin irritation. It is important to monitor your skin's reaction closely. The moment the warmth becomes uncomfortably strong or you feel a sharp burning sensation, you should remove the plaster immediately. This strong reaction is why the product is often chosen for brief, intensive warmth rather than a prolonged gentle effect. Afterwards, you can gently wipe the area with a damp cloth.
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