Introduction: Abnormal Uterine Bleeding (AUB) is defined as any deviation from the normal menstrual cycle which is abnormal in frequency, regularity, duration, and volume of flow outside of pregnancy. AUB usually accompanied with lower abdominal pain and discomfort which presents a substantial burden on patient’s health, quality of life, society and healthcare system. Aims and objective: 1. To describe the distribution of abnormal uterine bleeding (AUB) type according to the Polyp (AUB-P); Adenomyosis (AUB-A); Leiomyoma (AUB-L); Malignancy and Hyperplasia (AUB-M); Coagulopathy (AUB-C); Ovulatory Dysfunction (AUB-O); Endometrial (AUB-E); Iatrogenic (AUB-I); and (AUB-N) Not yet classified according to International Federation of Gynecology and Obstetrics (FIGO) classification system.2. To find an association between risk factors and type of AUB.Materials and Methods: A Hospital-based Cross-sectional study was conducted among 400 women suffering from AUB for six months and who were admitted to the Gynecology ward at RIMS hospital as inpatients and who were willing to participate with informed consent were included for a period of 1 year from June 2023 to May 2024. A Convenience Sampling method was applied to select the calculated sample size of 400 for the study. Analysis: A structured interview questionnaire and checklist were administered to collect the data and entered into Microsoft Excel 2010 and further analysis was done with SPSS software 22.0 version. Categorical variables were expressed in percentages. Finally, the association factors that have a p-value of < 0.05 were considered statistically significant.Results: In our study 180(45%) belong to the age group of 21 to 30 years, followed by 31-40 years accounts for 114(28.5%). 228(57%) were urban residents 172(43%) were rural residents. As per PALM-COIEN classification majority were structural (Polyp+ Adenomyosis+ Leiomyoma+ Malignancy) causes accounts for 274 (68.5%). Leiomyoma (AUB-L) 106(26.5%) was the most common cause of AUB in this study. In our study, urban residents, married women, multiparous and employed, were found to be the significant risk factors for AUB with p-value <0.05.Conclusion: The PALM-COEIN classification system facilitates accurate diagnosis, which in turn helps optimize treatment strategies for AUB patients. By categorizing AUB based on its underlying causes, this classification system is useful in the management of AUB, ensuring that treatment strategies are tailored to the specific cause of the bleeding. Urban residents, married women, and multiparous and employed women show stressful lives among the risk factors for AUB.