A system for jet hydrotherapy configured to produce a fluid jet from an aerated fluid flow at sufficiently high velocities/pressures for massage or therapeutic treatment, which is accomplished by an internal geometry that places, at least, fluid and gas orifices, vessels and nozzles in the optimum location and configuration to create high fluid flow velocities throughout the system. The system also is configured to produce a fluid jet with sufficiently high gas content such that a user experiences less discomfort and/or pain when the fluid jet is applied to sensitive tissue areas. The system also is configured to provide a tactile interface upon which a system user can mechanically engage to supplement the jet hydrotherapy.
