Effect of adjunctive transcranial direct current stimulation and cognitive behavior therapy on headache disability in episodic frequent or chronic tension-type headache: A pilot, exploratory study

Background: Literature suggests that non-pharmacological treatments like non-invasive brain stimulation and cognitive behavioural therapy (CBT) may be used as augments in the management of Tension-Type Headache (TTH). Aims and Objectives: To assess the efficacy of Transcranial Direct Current Stimulation (tDCS) and Cognitive Behavioral Therapy (CBT) compared to treatment as usual (TAU) on headache-related disability and the psychological impact of headache on life of patients suffering from TTH. Materials and Methods: Thirty right-handed TTH patients HDI (headache disability index) > 30 were randomly allocated to group A (tDCS + TAU), group B (CBT + TAU), and group C (TAU). While the primary outcome measure was headache related disability (Headache Disability Index(HDI)), somatic symptoms (Somatic Symptom Severity (SSS-8)), anxiety & depression (Hospital Anxiety and Depression Scale (HADS)) and sleep quality (Pittsburgh Sleep Quality Index (PSQI). Assessments were done at baseline, end of the third and sixth month. Results: We found a statistically significant reduction in HDI (F=12.419, p <0.001), SSS-8 (F=4.587, p=0.010), and HADS-anxiety (F=4.810, p=0.002). tDCS showed better efficacy than CBT, while these two were significantly better than TAU on HDI and SSS-8. On HADS-A also both tDCS and CBT were better than TAU, but showed no significant difference between them. Conclusion: Supplementing non-pharmacological techniques like tDCS and CBT will be effective in reducing headache-related disability and associated psychological symptoms.