Shoulder capsulitis or frozen shoulder is a painful condition causing limitations of shoulder movements. Its incidence is about 2%, comprising mostly women. There is a need for more controlled trials on frozen shoulder preferably in general practice, without using technical guiding instruments for injections as MRI or computer tomography, because the condition is routinely treated in general practice. It was therefore important to conduct this study as similar as possible to current practice. The procedure should be simple, safe and less time consuming.