noun
sitz bath; hip bath
A shallow bath where one sits with water covering only the hips and lower abdomen, often used for therapeutic or hygienic purposes.
産後は腰湯で傷口を清潔に保つように言われた。
After giving birth, I was told to keep the wound clean with a sitz bath.
痔の治療に腰湯が勧められることがある。
A hip bath is sometimes recommended for treating hemorrhoids.