Effect of Bariatric Surgery on Migraine Headache: A Systematic Review and Meta-Analysis
Bibliographic record
Abstract
BACKGROUND: Migraine is a common, disabling neurological disorder, and obesity has been associated with an increased frequency of migraine, chronicity, and severity. Bariatric surgery is the most effective treatment for substantial weight loss in morbidly obese patients. We conducted a systematic review and meta-analysis (per PRISMA 2020 guidelines; registered in PROSPERO (CRD420251175413)) to assess whether bariatric procedures influence migraine frequency and severity in patients with obesity. METHOD: We searched PubMed, Scopus, and Embase for studies on obese patients with a history of migraine who underwent bariatric surgery (including sleeve gastrectomy, Roux-en-Y gastric bypass, or gastric banding) and reported pre- and postoperative migraine outcomes. Six studies (n=1899 patients) met the inclusion criteria. Data on migraine frequency, intensity, and disability before and after the surgery were extracted. Outcomes were pooled using a random-effects meta-analysis, and study quality was assessed using the Newcastle-Ottawa scale. RESULTS: Across the six included studies (n=1899), a variety of bariatric procedures were performed (sleeve gastrectomy, Roux-en-Y bypass, and gastric banding). The pooled results showed a consistent and significant reduction in migraine frequency following surgery. All pooled effect estimates favored the postoperative state, indicating fewer monthly headache days after weight loss surgery. Individual studies have also reported a reduction in migraine pain severity and disability after surgery. The magnitude of headache improvement was correlated with weight loss. Mechanistic insights suggested that postoperative weight loss led to hormonal changes (e.g., lowered calcitonin gene-related peptide levels) and reductions in pro-inflammatory cytokines (such as IL-6 and TNF-α), all of which may contribute to the observed migraine relief. CONCLUSION: This systematic review indicates that bariatric surgery substantially reduces migraine frequency and severity in obese patients. Migraine improvement likely arises from the multifactorial effects of massive weight loss, including neuroendocrine modulation and decreased systemic inflammation, rather than bariatric surgery per se. Given the high comorbidity between obesity and migraine, weight-loss surgery should be considered as a therapeutic option to alleviate the migraine burden in obese individuals.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.011 | 0.030 |
| Meta-epidemiology (narrow) | 0.003 | 0.002 |
| Meta-epidemiology (broad) | 0.018 | 0.041 |
| Bibliometrics | 0.007 | 0.007 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.003 | 0.002 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.002 | 0.002 |
| Insufficient payload (model declined to judge) | 0.004 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".