This study aims to compare disability and mood state in patients with episodic (EM) and chronic migraine associated to medication overuse (CM-MO), and to assess the relationships between the two outcomes. Patients, matched for age and gender, were administered the MIDAS, the WHO-DAS-2 and BDI-2. Difference between EM and CM-MO was assessed with the Kolmogorov-Smirnov Test; difference in distribution of patients with severe disability and low mood was tested with contingency coefficient; the correlation between MIDAS, WHO-DAS-2 and BDI-2 was tested with Spearman's index. Seventy patients were enrolled: CM-MO patients reported higher BDI-2 scores and higher MIDAS and WHO-DAS-2 scores, and were more likely to have severe disability and low mood state than those with EM; BDI-2 scores were correlated with disability scores, particularly with WHO-DAS-2. The study shows that disability and mood state are negatively impacted by the presence of more frequent headaches and by the overuse of acute medications.