Personal care device

A personal care device comprising an elongated handle for manually moving the personal care device along a body surface, a working head comprising at least one cutter unit and attached to said handle for effecting a personal care treatment to said body surface, at least one detector for detecting at least one behavioral parameter indicative of a user's behavior during handling the personal care device when effecting the personal care treatment, and an adjustment device for adjusting at least one working parameter of the personal care device in response to the detected behavioral parameter, said adjustment device including an adjustment actuator controlled by an electronic control unit provided with a control algorithm for calculating an output control signal for the adjustment actuator in response to at least one behavioral input signal indicative of the at least one detected behavioral parameter, wherein said electronic control unit is provided with a modification algorithm for modifying the control algorithm on the basis of at least one modification input signal, wherein said at least one modification input signal and said at least one behavioral input signal come from the same detector and correspond to the same detected behavioural parameter.