Personal hygiene device having a handle, a treatment head mounted for movement relative to the handle against a spring force when a treatment force is applied in at least one treatment direction onto the treatment head, a treatment force measurement unit for determining the applied treatment force comprising a capacitive force sensor having a first electrode and a second electrode mounted at a distance to the first electrode, which second electrode is movably mounted with respect to the handle, a spring unit being arranged between the first and the second electrode, and a control circuit for determining at least one parameter indicative of the capacitance between the first electrode and the second electrode, wherein the second electrode is mechanically coupled with the treatment head and is arranged to be moved relative to the first electrode when the treatment force is applied at the treatment head.
