Never realized my tailbone sits slightly crooked until now, it's started digging straight into the skin against whatever surface I'm sitting on, since the cushioning back there is basically gone. Ended up switching to a donut cushion just to manage. Genuinely painful at times, and honestly I'd consider having part of it surgically trimmed if I were fifteen or twenty years younger. Still, no other treatment I've tried has ever gotten me this far with weight loss, and I'm incredibly grateful for it.