The best thing would be to ask the manufacturer.

According to the instructions before not:
"Use the FC 90 Pureo Ionic Skin Care only for treatment on the human face.The device is only intended for the purpose described in the instructions for use. Use the appliance only in the manner described. The manufacturer cannot be held liable for any damage caused by improper or careless use".

https://www.libble.de/beurer-fc-...