I’ve had a similar experience with a standing desk - it helped, but only when I alternated sitting/standing instead of standing for long stretches. A balance ball chair can feel good short-term, but I found it tiring if I used it for hours, so I keep it as a “20–30 min at a time” option. What made the biggest difference here was basic ergonomics (screen height, chair support, feet flat) plus regular micro-breaks every hour. Gentle core work (bird-dogs, glute bridges) and hip/hamstring mobility also helped over time. If pain is sharp, new, or getting worse, it’s still worth getting a physio/doctor check just to rule things out.