u/niba0

so i recently got aeron classic size b refub im 5'8,i've been using it like 5 days and i got this problem where the lower back part on backrest which acts as lumbar support feels like it's digging in to my back making it literally torture to sit in this chair like i always feel tension in that part of my back,does someone had that problem aswell,does my back need time to adapt or it's not gonna get better and i just send it back,im not using any lumbar cause it's even worse with it