Yakuyo Hot Tab Jyu-tansan-yu Classic is characterized by its fine, silky bubbles. It contains a large amount of bicarbonate ions, making it effective for conditions such as sensitivity to cold, stiff shoulders, and lower back pain. [Effects and Efficacy] Sensitivity to cold, lower back pain, stiff shoulders, fatigue recovery, rheumatism, neuralgia, heat rash, cold sensitivity before and after childbirth, hemorrhoids, bruises, sprains, chilblains, rough skin, chapped skin, cracks, acne, eczema