A device for vibration stimulation in a body cavity of a mammalian subject is disclosed. The device comprises an expandable stimulation member (12, 22) that is arrangeable in a first state, in which the stimulation member is introducible into a body cavity of the subject, and a second state, in which the stimulation member is expanded, by means of a flow of pressurized fluid to the stimulation member, to a volume such that an outer surface of the stimulation member is adapted to abut against body tissue in the body cavity and to impart vibrations to body tissue in the body cavity of the mammalian subject, wherein the stimulation member constitutes a fluid tight chamber so as to prevent leakage of fluid into the body cavity. The device further comprises a vibration generator (10, 20), and a vibration controller (14, 24) adapted to control the vibration generator to bring the stimulation member to vibrate according to a vibration pattern. The vibration pattern comprises a main periodic element of a first frequency and an excitation stimulus of a second frequency higher than the first frequency.
