Introduction Breast self-examination (BSE) and clinical examination of the breast recommended as complementary method of screening for women in the reproductive age group. BSE is of great potential value for the early detection of breast cancer. BSE has been proposed as a means of reducing the breast cancer problem. Although it is reported to be not as effective as mammography or examination by a trained physician, it may be a valuable approach, particularly in the countries that cannot afford sophisticated screening services for the entire female population at risk. Objectives To identify the burden of breast lump in selected age group and associated risk factors of breast cancer in breast lump cases. Methods All women (15 to 49 years) of Jalpapur enrolled in the study. Training program organized to the co-workers to develop skill on physical examination. Pre-testing of the tool was done in Dharan Municipality of Sunsari district. It is near by area from Jalpapur for feasibility and practicability of the study. Data collection procedure was started after validation and pre-testing of the tools. Prevalence drawn based on physical examination of breast in sampled population. Risk factors calculated based on responses given by the participants and obesity calculated by the body mass index (BMI) calculation technique provided by World Health Organization. Results Out of 541 respondents, 21(3.9%) cases had breast lumps and found that women aged 40-49 years were high-risk group for having breast lump. The most prominent associated risk factors of breast cancer among lump cases might be menstrual period (11-21 days), grand multi-gravita, breast feeding, age of menarche (12 years), age of first childbirth (15-19 years) and body mass index (<18.5). Conclusion The data collected from Jalpapur VDC of Sunsari district conclusively brought out that women aged between 15 to 49 years, were not free from breast lumps. There is no significant relation of age with breast lump in this study.