Baby scratching face

Hey moms! Our 5m son has eczema and he scratches his forehead all the time dispite frequent creams and medication, it kind of became his habit. Skin keeps being irritated and he just makes it worse by scratching. We trim his nails and sometimes put mittens on him but that limits his development. The main problem is sleeptime — he wakes himself up with

scratching 🙈 we swaddle him and this helps but it looks like he will soon start rolling over so we want be able to that anymore. Any tips/ideas?