In this multi-center study the Activity Index Questionnaire will be tested regarding its outcome quality regarding usability and patient acceptance. Each center collects data of 10 patients with injection pain therapy. Each patient is interviewed twice and after the 2nd interview each patient will fill out a feasibility questionnaire. During the whole study, the use and consumption of oral analgetic drugs are monitored in a diary. The statistical Analysis is done descriptive. Before entering the study, each patient has to give informed consent to participate. National Registration Guidelines for post market surveillance will be obtained.