A skin treatment system (1) comprises a functional member (20) configured to perform a treatment action on skin (2) and to be moved over the skin (2) during operation of the system (1), and a measurement unit (40) including a measurement member (41) configured to be moved over the skin (2) along with the functional member (20) and to be made to indent the skin (2) in the process. The measurement member (41) is displaceable in the measurement unit (40), and the measurement unit (40) is configured to measure a value related to an extent to which the measurement member (41) gets displaced relative to a default position in the measurement unit (40) by action of the skin (2). The measured value corresponds to a measure of an extent to which the skin is indented by the measurement member (41). On the basis of measurement results generated by the measurement unit (40), it is possible to automatically adapt operation of the system (1) to the type of body area under treatment.

A skin treatment system (1) such as a depilating system comprises a functional member (20) that is configured to perform a treatment action on skin (2) and to be moved over the skin (2) during operation of the system (1), and a measurement unit (40) including a measurement member (41) that is configured to also be moved over the skin (2) during operation of the functional member (20) and to contact the skin (2) in the process. The measurement unit (40) is configured to measure at least a force value in an advancing direction in which the measurement member (41) is moved over the skin (2) during operation of the functional member (20). The measured force value in the advancing direction is used for the purpose of determining a friction coefficient value representative of the friction coefficient of the skin (2), which allows for assessing skin condition.