No necessarily no. But DDD can cause loss of disc height as well as other things, such as spinal compression. DDD is early hardening of the discs and loss of hydration. Healthy discs are full and jelly, and real cushiony. A disc with DDD loses it cushion and begins to harden.
Hardening of the discs is normal and happens to us all. But, for many, it happens early and causes back aches, then for some.. it generates severe pain through the process. Many discs degenerating emit a chemical and the nerves get irritated by the chemical and this causes pain. Also if the discs are compressing/flattening, the spine itself can also be sending signals to cause pain as well. Then if you have anything pushing or impinging the nerve roots, that too can cause pain, numbness, weakness, etc.
Hope this helps.