also: ハップ
noun
A soft, moist mass applied to the skin for medicinal purposes. Often used in medical or nursing contexts.
from Dutch pap
See also: パップ剤
炎症を抑えるために、患部にパップを貼った。
I applied a poultice to the affected area to reduce inflammation.
パップ剤は湿布
A poultice preparation is a type of compress.
湿布 is a general term for a compress or wet pack, while パップ specifically refers to a poultice, often with a paste-like consistency.
Borrowed from Dutch 'pap', meaning a soft paste or poultice.