. I have had bilateral lower costal margin (lower rib margin) pain, flank pain  for about 8 years           . Pain pattern Pain starts within 1 second of sitting. Standing reduces the pain by about 90% within 10 seconds. Walking causes only 2–5% pain. Before getting out of bed in the morning, I have no pain. Lying down causes about 20% pain.                           The pain is spread across both lower rib margins, not one small point. The sensation is mainly pressure/tightness, not burning or stabbing. The pain is NOT affected by Deep breathing Coughing Sneezing Meals Leaning forward Hard vs. soft chair Pressing on the painful area Tests reported as normal CBC ESR CRPVitamin DVitamin B12 Urine tests Chest X-ray Abdominal ultrasound Thoracic (dorsal) spine MRI Upper GI endoscopy Musculoskeletal ultrasound of the anterior abdominal wall Chest wall MRI has been performed, and the report is expected today. Treatments tried..."I have just received my chest MRI report today."