Objective To discuss the relation between gynecologic tumor and dysmenorrheal and tongue petechia, make clear the diagnostic value of tongue petechia in gynecology department tumor and dysmenorrheal, and provide theoretic basis for diagnosing gynecologic diseases by TCM. Methods A total of 169 patients with gynecologic tumor and dysmenorrheal were set as a treatment group, and a total of 211 patients who excluded the tongue signs of gynecologic tumor and dysmenorrheal were set as a control group. Tongue petechias were identified and compared between the two groups. Results ①Probability of tongue petechia showed a significantly higher value in the treatment group than the control group. (P<0.01) ; ②Probability of tongue petechia showed a significantly higher value of patients with tumor in the treatment group than patients with other gynecologic diseases in the control group (P< 0.05) ; ③Probability of tongue petechia showed a significantly higher value of patients with dysmenorrhea in the treatment group than patients with other gynecologic diseases in the control group (P<0.01). Conclusion ①Relevant researche of gynecologic tumor, dysmenorrheal and tongue petechia at the tip of tongue was based on TCM theory, diagnostics and clinical experiences. The data of this study has proven this diagnostic method.②Compared with other kinds of diseases, gynecologic tumor and dysmenorrheal showed a higher probability in the appearance of tongue petechia. Therefore, petechia at the tip of tongue can be used as one of diagnostic references for gynecologic tumor and dysmenorrheal.