massaging plaster; medicated plaster for massage
A plaster or patch applied to the skin, often containing medicinal ingredients, used to relieve muscle stiffness or pain through massage-like effect.
Applying a massaging plaster to stiff shoulders brings relief.
Compound of 按摩 (massage) and 膏 (ointment, plaster). The exact historical derivation is uncertain, but the term likely emerged in modern medical contexts.