A device for stimulation of the hypothalamus in a human subject, comprising: an expandable stimulation member comprising a stimulating portion arranged to abut against the tissue of the posterior part of the nasal cavity and to stimulate the hypothalamus by imparting vibrations to the posterior part of the nasal cavity; an expansion member arranged to expand the stimulation member, the expansion member comprising: a tubular structure arranged at least partly within the stimulation member and comprising a plurality of openings arranged for fluid communication with the stimulation member, the tubular structure having a bending stiffness in a first direction, essentially perpendicular to a longitudinal direction of the tubular structure, being different from a bending stiffness in a second direction essentially perpendicular both to the first direction as well as to the longitudinal direction of the tubular structure; and an elongated structure arranged in fluid communication with the tubular structure, wherein the elongated structure is tubular and has a diameter being 2 to 4 times the diameter of the tubular structure wherein the device further comprises a retaining portion arranged to abut against the tissue of the anterior part of the nasal cavity, wherein a portion of the elongated structure and a portion of the stimulation member form said retaining portion, and a vibration member which is connected to the expansion member and is arranged to bring the stimulation member to vibrate. an expandable stimulation member comprising a stimulating portion arranged to abut against the tissue of the posterior part of the nasal cavity and to stimulate the hypothalamus by imparting vibrations to the posterior part of the nasal cavity; an expansion member arranged to expand the stimulation member, the expansion member comprising: a tubular structure arranged at least partly within the stimulation member and comprising a plurality of openings arranged for fluid communication with the stimulation member, the tubular structure having a bending stiffness in a first direction, essentially perpendicular to a longitudinal direction of the tubular structure, being different from a bending stiffness in a second direction essentially perpendicular both to the first direction as well as to the longitudinal direction of the tubular structure; and an elongated structure arranged in fluid communication with the tubular structure, wherein the elongated structure is tubular and has a diameter being 2 to 4 times the diameter of the tubular structure a tubular structure arranged at least partly within the stimulation member and comprising a plurality of openings arranged for fluid communication with the stimulation member, the tubular structure having a bending stiffness in a first direction, essentially perpendicular to a longitudinal direction of the tubular structure, being different from a bending stiffness in a second direction essentially perpendicular both to the first direction as well as to the longitudinal direction of the tubular structure; and an elongated structure arranged in fluid communication with the tubular structure, wherein the elongated structure is tubular and has a diameter being 2 to 4 times the diameter of the tubular structure wherein the device further comprises a retaining portion arranged to abut against the tissue of the anterior part of the nasal cavity, wherein a portion of the elongated structure and a portion of the stimulation member form said retaining portion, and a vibration member which is connected to the expansion member and is arranged to bring the stimulation member to vibrate.