Background: There is an unmet need for the correct diagnosis of primary headache disorders, such as migraine, in primary care. Misdiagnosis is associated with suboptimal management of patients, and it is now widely accepted internationally that better diagnostic support is needed for general practitioners (GPs). In this study, we describe the development of a short, patient-directed questionnaire and supporting documents that aim to help with the diagnosis of headache disorders in primary care. We have also prepared patient feedback material and collected preliminary input from patients, but the main aim of this report is to invite comment and debate on the use of the questionnaire in real-life clinical practice.Methods: This questionnaire was developed over 18 months using the clinical experience of the authors, current literature review and the International Classification of Headache Disorders (ICHD), 3rd edition, for migraine, tension-type headache, cluster headache and medication-overuse headache. The questionnaire and two supporting documents will hopefully assist the GP to make a correct diagnosis. A patient survey was used to gather feedback from a small number of patients, and based on these comments, the questionnaire and the supporting documents were modified and updated.Results: Feedback gathering was attempted in Austria, Germany, Switzerland, Ireland and Spain, but was only possible in Austria due to the COVID-19 pandemic restrictions. From the 18 patients who participated, 17 responded about how easy or difficult the questionnaire was to complete, with 14/17 (82%) being able to complete the questionnaire easily on their own. Overall, the patients found the questionnaire averagely helpful in reminding them of and communicating their headache triggers, symptoms and behaviour changes; on a scale of 1–5, with 1 being very helpful and 5 being not helpful at all, the mean scores were 2.8 and 2.7 (n=18), respectively. Conclusions: This questionnaire and associated documents were developed with a view to helping GPs to make an accurate headache diagnosis quickly in primary care. Following feedback from patients, updates have been made, including changes to reduce the time it takes to complete the questionnaire. Next steps include wider validation and feedback from primary care physicians.