Patients will be allocated to the study groups by computerized block-randomization with three permutations per block. Group 1 consists of patients receiving Triamcinolone 20 mg intraarticular injection with Lidocaine 10mg/ml 3 ml and a total of 4 ml solution. Group 2 patients will receive intraarticular Triamcinolone 20 mg, 3 ml Lidocaine and the rest with physiological natrium chloride 9 mg/ml, comprising a total volume from 8 ml and upwards up to 20 ml. Group 3 will serve as a control group and patients in this group could receive any other treatment other than corticosteroid injections or per oral corticosteroid medication. The control group will remain without treatment with corticosteroids, in injection or tablet form till 61 days, which is also the last day of the outcome measurements. The time interval between the 1st and 2nd treatment will be 7 days, between the 2nd and 3rd treatment 10 days, and between the 3rd and 4th treatment 14 days. Patients will also receive a follow-up by mail 6 and 12 months after the inclusion, where pain and function (SPADI) is investigated.