A pathologic disc can compress the sciatic nerve resulting in sciatica. Although any pathologic disc is potentially serious.
The danger with a disc bulge or herniation is that the disc can compress the spinal nerve within the intervertebral foramen, causing a pinched nerve.
The most common symptom of Achilles’ tendinitis is pain at the Achilles tendon. Pain is usually not present at rest, but will be evident upon palpation.
Achilles tendinitis involves swelling of the tendon; Achilles tendinosus involves tendon degeneration. Achilles bursitis involves swelling of the bursa.
Achilles tendinitis most often occurs due to overuse of the gastrocnemius and soleus contracting to plantarflex the ankle joint.