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Background and Aims Headache disorders are complex and multifactorial. Despite research on head posture and headache, comprehensive analyses of multiple postural and proprioceptive parameters across the body are lacking.This pilot study aimed to compare foot posture, lower extremity flexibility, spinal angles (lumbar, thoracic, cervical), trunk position sense, and forward head posture between individuals with headache and asymptomatic controls.Methods A cross-sectional pilot study was conducted with (n:36) participants divided into two groups: individuals with headache (n:18) and matched controls without headache (n:18). Foot posture was assessed using the Foot Posture Index (FPI) and Navicular Drop Test (NDT). Lower extremity flexibility was measured through standardized goniometric assessment. Spinal angles were evaluated using digital inclinometry at lumbar, thoracic, and cervical regions. Trunk position sense was assessed by means of repositioning error tests with a dual inclinometer. Forward head posture was evaluated by measuring the distance between the tragus and malleolus from the lateral side. Between-group differences and correlations were analyzed using appropriate statistical methods with significance set at p<0.05.Results No significant differences were found between groups in trunk position sense, flexibility tests, spinal angles, and foot posture measures (p>0.05), except for left gastrocnemius flexibility where controls showed better performance (p<0.05). In headache sufferers, pain severity did not correlate with trunk position sense or lower extremity flexibility. However, lumbar and cervical spinal angles significantly correlated with pain symptoms (p<0.05). The tragus to malleolus distance correlated with headache medication consumption (p<0.05).Abstract EP160 Table 1Descriptive statistics of the participantsAbstract EP160 Table 2Comparison of postural evaluations and trunk position sense between groupsAbstract EP160 Table 3Demonstration of the relationship between pain symptoms and postural assessments in individuals with headache (n:18)Conclusions The findings suggest that lumbar spine alignment, gastrocnemius flexibility, and cervical angle may influence headache occurrence and severity. In individuals with headache, more effective solutions can be developed in the treatment of headache by taking into account the alignment disorders of the lumbar region and especially the cervical region and treatment plans for these disorders.