Ovarian cyst is a fluid-filled sac in the ovary, common among reproductive women. Mucinous cystadenoma is a common variety of non-functional benign lesions that presents vague symptoms and can mislead the diagnosis. A 26-year-old female presented to the clinic with weakness and lethargy, which lasted for 3 months, along with other symptoms like headache, abdominal pain, bloating, nausea, and constipation. She was managed with iron deficiency anaemia, however, her symptoms did not improve. Later, an ultrasound revealed an ovarian cyst. Laparoscopic left-sided ovarian cystectomy was performed and a biopsy was sent for histopathological examination. The case highlights the various nonspecific symptoms in a case of an ovarian cyst. Gynaecological causes for systemic symptoms should always be considered, along with proper gynaecological history and examination. This helps with the accuracy of diagnosis and treatment options, with minimal costs.