Purpose: Studies have reported on treating various diseases with marine healing, but not the effects of marine healing on depression, anxiety, and pain in single-parent families. This study aimed to evaluate the scientific efficacy of treatment using peat-pack poultice and salt groundwater and evaluate its effects on depression, anxiety, and pain in single-parent families. Methods: For 26 women of single-parent families, peat-pack thermal therapy and salt-water foot baths were performed daily for 4 days. Of the 26 subjects, three dropped out and 23 were enrolled in the study. The depression and pain results were compared before versus after the peat-pack poultice and salt groundwater treatments. The Edinburgh Postnatal Depression Scale, Hospital Anxiety and Depression Scale (HADS), and visual analog scale (VAS) pain score were evaluated. Results: In Taean-gun, a peat-pack poultice and salt groundwater foot bath program were administered along with a questionnaire for depression, anxiety, and pain. Mean Edinburgh score was significantly improved after the program (11.78±7.6 vs. 9.7±7.6, p=0.005), mean HADS anxiety score (7±9.7 vs. 5.3± 2.7, p=0.002) and mean VAS pain score also improved (5.39±2.8 vs. 3.96±2.7, p=0.003). Conclusion Peat-pack thermal therapy and salt groundwater foot bath improved chronic pain, depression, and anxiety in single-parent families.