Water gush.
Whether cold or warm: At the very latest since Kneipp, the water gush has been known as a therapeutic application.
Warm (38 °C-40 °C): Warm gushes over arms and legs have an anticonvulsant effect on muscular tension and non-bleeding wounds. With colds, bronchitis, catarrhs, rheumatic illnesses and lumbago, water gushes over the upper body can alleviate the symptoms.