Sciatica is irritation of the sciatic nerve that sends pain, tingling, or numbness from the lower back or buttock down one leg, and sitting makes it worse by compressing the nerve and the muscles around it.
Sciatica from sitting is irritation or compression of the sciatic nerve caused by prolonged seated pressure, tight hip muscles, and reduced movement, producing pain that radiates from the lower back or buttock down one leg.
Stress and tension between the shoulder blades is upper-back muscle tightness caused by the body's stress response, which makes you hunch, hold your breath, and clench the muscles around your neck and shoulders.
Pain between the shoulder blades from sleeping is upper-back stiffness or ache caused by a poor sleep position, an unsupportive pillow, or a sagging mattress that leaves your mid-spine and shoulders unsupported overnight.
For most posture-driven pain between the shoulder blades, an AI posture app or physiotherapy outperforms generic exercises, because both add the personalization and feedback that random routines lack.