REST. I had pains in my forearms by the end of 2016, took a couple of months away then started back working on stuffs in Feb of 2017...by August of 2017 the pain was back- not only in my forearms, but in my left elbow, shoulders, and upper back...I took another couple of months away and then slowly paced myself to a finish. I took off 4 months and built up a buffer on the next chapter, but burned through it coz a page I was working on took a LONG time...finally by 2019, the back pains and issues mounted up til I had to take extended time away- every time I raised my arms at my desk, they would hurt.
Long story short- I ended up taking a couple of years away from doing art period. It helped...I still have issues, but they're not as excruciating as they were between 2017 and 2019; I've mostly been working on standalone pieces, so once I finish a piece I take a couple days to a week to relax before starting the next.
There is a low key fear for me that if I start back working on pages I'll start messing myself up again, so I told myself that I wasn't going to publish/post any pages until I finish a majority of the chapter; that way I'm not pressuring myself into unhealthy work habits that make my arms and back even worse than before.
Other than that, often for me life gets in the way- like either work at my day job is really exhausting and I come home and cant work or something takes me out of my focus zone...recently, my tablet died(a Huion tablet that I had for only 4 years) so that was frustrating coz I spent 2 weeks trying diagnose/analyze and fix the problem- til I realized it couldnt be fixed...so I had to buy a new tablet; now I'm trying to get used to said tablet while trying to get out a new piece.