Where on the body is it appropriate and safe to apply this mustard plaster?

This warming plaster is suitable for application on areas with thicker skin and good muscle coverage, such as the upper back, chest (avoiding the breast tissue and heart area), and the calves. These are common areas people target for a warming effect after feeling chilled. It is critically important to avoid delicate, sensitive, or thin-skinned areas. Do not apply the plaster to the neck, face, underarms, inner thighs, or over joints like the knees and elbows. Never use it on areas with broken skin, sunburn, rashes, cuts, or any signs of irritation. The four-compartment design helps distribute the powder evenly, but for consistent and safe results, the plaster should lie flat on a clean, dry, and intact area of skin.