BACKGROUND: Breast cancer as the malignant tumor with the highest incidence and mortality rate among the global female population. Insomnia is a common complaint in breast cancer patients, more than one-third (38-47%) of breast cancer patients suffer it. Auricular acupressure (AA), a non-pharmacological therapy, has been used in the studies to intervene in insomnia in breast cancer patients. The objective of this systematic review and meta-analysis is to investigate the efficacy and safety of AA therapy in intervening with insomnia in breast cancer. METHODS: A systematic literature search was performed for 10 databases up to January of 2024 to identify randomized control trials (RCTs). The methodological quality of RCTs was assessed independently using the Cochrane Handbook for Systematic Reviews of Interventions. The quality of evidence was evaluated with the Grading of Recommendations Assessment, Development and Evaluation approach. Data were screened and extracted independently using predesigned forms. The meta-analysis was conducted using RevMan 5.3 software, P-value <
.05 means statistically significant. RESULTS: This review included 15 studies from 3 different countries with a total of 1125 adult participants. The pooled results showed that AA significantly in improving sleep quality (mean difference [MD] = -3.36, 95% confidence interval [CI]: [-4.65, -2.07], P <
.001) and life quality (MD = -7.82, 95% CI: [-14.76, -0.88], P = .03). Based on data from sleep monitoring devices, AA was valuable for improving sleep efficiency (MD = -3.63, 95% CI: [-4.19,-3.07], P = .03) in breast cancer patients. Adverse events were reported in 5 RCTs. Common adverse reactions include auricular skin allergic reaction (10/259, 3.9%), bruising (7/259, 2.7%), pain (3/259, 1.2%), and local pressure ulcers on the auricular points (2/259, 0.8%). The evidence grade was moderate because of the substantial heterogeneity among studies. Heart, Shenmen, and Subcortex were the 3 most numerous auricular points, with a total share of up to 71.70%. CONCLUSION: This systematic review and meta-analysis demonstrates the efficacy and safety of AA in intervening insomnia in breast cancer patients, providing a basis for the selection of clinical auricular points. However, the high-quality RCTs in existence are not enough, and more rigorous trials are needed to identify the efficacy of AA and insomnia.