How to stop my mother from gnawing at her hands

hi, my mom has struggled with dermatophagia for as long as i can remember. i don’t remember a time where she wouldn’t stare off into space, mindlessly picking at the skin on her hands until they were raw. when i was around 11 i picked up this habit and i have struggled ever since. however it’s not nearly as bad as hers and i take alot of precautions to avoid triggers (wearing gloves, getting my nails done, hand creams, et). i also made sure NOBODY saw me, id scratch at my skin in my pockets or under the table. My mom however will do it anywhere, infront of my family, sometimes even infront of friends of mine which is quite disturbing for them really. There’s been some family trouble recebtly which i wont get in to on here but i feel it’s either getting worse or i’m just more aware of it triggering me. I don’t want to talk to her about it upfront as it’s awkward on both ends? is there any way i can make her stop or atleast try to help her without a direct confrontation?