Appendectomy is the most common surgery in the world. Pain, bloat and nausea are the most side effects after appendectomy that leads to high morbidity and dissatisfaction in these patients. Herbal therapy is one the treatment .This study conducted aimed to investigate the effect of super mint on pain, nausea and bloat of patients undergoing of appendectomy. This study was a double-blind clinical trial that has been conducted on 82 patients (control group: 41 patients) and (case group: 41 patients) that were undergoing appendectomy in first 24h in Ariashahr hospital at Mashhad city. Super mint and placebo have been used by patients by oral feeding in five steps with 20 minute intervals. The Pain, bloat and nausea have been measured by use of Visual Analogue Scale (VAS) questioner that approved in different studies. Age ranges of patients were 15-52 year. Descriptive tests showed that two group in to age, sex, operation time, anesthesia and awaken time were similar and not found significant difference. The results showed that oral feeding of super mint led to decrease pain (p=0.04), nausea (p=0.01) and bloat (p=0.03). According to the results of present study it seems that feeding use of super mint in 24 h of postoperative time lead to decrease pain; nausea and bloat in patients were that undergoing appendectomy.