noun
hot sand bath
A therapeutic or leisure activity where one is buried in naturally or artificially heated sand, often at hot spring resorts.
砂蒸しは、温泉地で人気の体験です。
Sand baths are a popular experience at hot spring resorts.
海岸で砂蒸しを楽しんだ。
I enjoyed a sand bath at the beach.
砂風呂 also means sand bath, but 砂蒸し emphasizes the steaming aspect and is more commonly used for the hot-spring sand bath experience.
Compound of 砂 (sand) and 蒸し (steaming), from the verb 蒸す (to steam). The term describes the process of being heated by hot sand, often at volcanic hot spring areas.