noun
hot compress
Medical term for applying moist heat to a body part, often using a warm, damp cloth or pad.
肩こりには温罨法が効果的です。
A hot compress is effective for stiff shoulders.
Compound of 温 (on, 'warm') + 罨法 (anpō, 'compress method'). 罨法 itself is a medical term combining 罨 (an, 'cover' or 'compress') and 法 (hō, 'method').