Abstract: A hydromassage tub (1) allows the user to sit with a support for his/her head. The surfaces (5) for supporting the user (3) are shaped like waves in the cavities of which nozzles may -be disposed for the hydrojets, so as to maintain a slight distance from the user (3) and to allow these to be oriented to specific parts of the body. Medicaments or phytocosmetic substances may be injected along with the hydromassage jet by an assembly of containers, pumps and nozzles under the control of a switchboard. A display is located in front of the user (3) and is able to show the parameters and the development of the treatment and hydromassage processes. The hydromassage is performed under differentiated pressure in relation to the positions of nozzles (6) so as to obtain a higher pressure downwards and a progressively lower pressure upwards. The access to the tub is facilitated with the provision of a tight-seal door (9).