Kesimpta challenges

Hello I’ve recently changed DMT from Tecfidera to Kesimpta. Since the switch I’ve been experiencing sore eyes, mouth, very dry skin and regular bouts of cold sores. My face basically feels like it’s about to fall off (slight exaggeration, but it’s very unpleasant). I wondered if anyone else has experienced this on Kesimpta, and if so, is there anything out there that might help?