This study is a monocentric uncontrolled observational study to evaluate a 12-14 day inpatient stay in an internal medicine clinic for integrative and complementary medicine for patients with episodic migraine and/or episodic tension headache. The aim is to investigate the extent to which a 14-day inpatient stay can influence a reduction in headache days and/or pain intensity, medication use, quality of life, anxiety, depression, perceived stress, general well-being, and a reduction in sick days/work absenteeism, and prevent the chronification of migraine and may counteract the chronification of migraine or tension-type headache. In addition, patients' previous experiences with complementary naturopathic therapies, expectations and perceived benefits in everyday life will be analysed.