Introduction: About 30% of women may have unexplained uterine bleeding at some stage in their lives. There are considerable costs to both the economy and the health sector, in addition to the direct effects on the woman and her family. After excessive bleeding has been established, the acronym PALM-COEIN is increasingly being used to classify the causes. Objectives: To assess the prevalence and to find out the contributing factors of abnormal uterine bleeding (AUB). Materials and methods: A retrospective study approach was adopted with a descriptive research design. The population for the study includes women diagnosed with AUB. The tool contains demographic variables of women with AUB, clinical variables, and contributing factors to assess AUB by using PALM-COEIN classification. Results: With regard to age, the maximum 213 (78%) were in a group of 40 years and above. In the menstrual cycle, 159 (58.2%) were having a regular cycle. Out of 273 women, 202 (74%) have no previous history of medical illness. The value of body mass index (BMI) shows 151 (55.3%) had normal BMI. The prevalence rate was 6.94%. About 93 (34.1%) had maximum contributing factor with adenomyosis. Then, 50 (18.3%) had iatrogenic as a contributing factor. There is no malignancy and hyperplasia and coagulopathy as a contributing factor. According to the findings of this report, AUB can cause unnecessary disruption in women's daily activities, as well as serious medical consequences or exacerbation of anemia.