Why is the back dryness, and does it hurts in the morning?

If it is the first time, it will be eliminated, and there is no problem, but if it is repeated, There is probably a lumbar disc herniation, because the lumbar disc absorbs water between the vertebrae from during sleep, the distance between the vertebrae increases. After all, it swells and presses the vertebrae around.

When a person wakes up in the morning because the discs are well hydrated, they feel dryness in the back; now, if this disc is protruded, back pain and dryness increase in the morning.

And what discs require surgery?

Severe anesthesia in the pelvic floor (saddle area)

Severe shooting pain and back and leg pain that is not being cured with more than 3 months non surgical methods

Urinary and fecal incontinence

Progressive Numbness and weakness in limbs and progressive atrophy in lower limbs

Failure of non-surgical treatments for up to 3 months

MRI can not predict prognosis and results of disk surgery