Get usg of local part

Kindly do ESR CRP and RA factor since you have multiple joint pain

The localized swelling, “stuck” feeling while rising, inability to bend, and pain above the buttock fit this pattern, and the knee clicking/pain is likely a secondary biomechanical effect from altered posture and gait. This is not permanent damage, but it becomes chronic when core and hip stabilizers weaken due to long desk hours. Recovery is absolutely possible, but painkillers alone won’t work—you need targeted evaluation (lumbar + SI joint MRI if pain persists), posture correction, core/hip strengthening, activity modification, and temporary load reduction. Avoid prolonged sitting, floor sitting, and bending for now; use lumbar support, short walking breaks, and heat therapy—early correction prevents long-term worsening.