Hydrogel - Filling the degenerated spinal disc with chondroid gel Key Facts of Hydrogel Injection Therapy Indication: Painful spinal disc degenerationStrategy: A small tube is inserted into the affected disc. Waterbinding substances are inserted that will increase the spinal disc volume in order to decrease pain and improve function.Inpatient treatment: 3 daysRehabilitation treatment: 14 days outpatient or inpatient rehabilitationEarliest flight home: 7 days after surgeryRecommended flight home: 21 days after surgeryTime before showering: 1 day after surgeryRecommended time off work: 28 daysTime before driving a car: 14 days