Psychology :: The Hogan Personality Inventory (HPI) Explained Annular fibrosus doesn't have any blood or nerve supply (except the outer layer in the ligament that is understanding of pain). That?s why most injuries or mild tearing of annular fibrosus go unchecked unless the ligamentous tear is a member of other complications or injuries too. Research conducted by T W Stadnik suggests that weak/ damaged annular fibrosus and the resulting protrusion of disks is a fairly common condition that is certainly reported in approximately 40 to 80% of normal asymptomatic adults. Common symptoms which might be experienced by most people are low back pain that increases in intensity with activities like coughing, sneezing, bending or twisting. The pain could possibly be dull aching type, pin and needle sensation within the back region or sharp shooting. In the case of lower lumbar involvement, pain may also involve the lower limbs and pelvic region and also the power of pain improves with standing.