Ethanol Gel Versus Steroid in Refractory Lumbar Discogenic Pain

Inclusion Criteria: * Patient 18 years of age or older; * 2-month refractory pain to conservative treatment, non-surgical patients; * Chronic discogenic pain (1 or 2 lumbar discs) with concordant MR imaging; * Symptomatic for at least 8 weeks despite appropriate medical treatment; * Patient who agrees to participate in the study and who signed the informed consent form; * Patient with social protection. Exclusion Criteria: * Previous surgical treatment of the studied disc(s); * Patient with pure radicular pain; * Sick leave of more than 12 months secondary to the symptoms; * Patients who cannot read or write French; * History of cognitive-behavioral disorders that could interact with assessment by self-questionnaire; * Local or general infection, or suspicion of infection; * Severe coagulation disorders; * Other rheumatic inflammatory disease; * Undercurrent serious pathology with life expectancy \< 2 years; * Female of childbearing age that are known to be pregnant during inclusion visit or wishing to become pregnant before treatment; * Subject who has forfeited their freedom by administrative or legal award, or is under guardianship or under limited judicial protection * Patient participating in another interventional clinical trial or testing an experimental drug within 30 days of inclusion in the study.