Aim: Abdominal pain is among the most common reasons for admission to the emergency department. Abdominal pain may be nonspecific, increasing the difficulty of accurately identifying the underlying cause. The classic symptoms of deep vein thrombosis are edema, redness, pain in the affected area, and tenderness on palpation. This case report aimed to demonstrate the thrombus observed in the right iliac and femoral vein in a young patient who applied to the ED with abdominal pain. Case: An 18-year-old female patient applied to the emergency department with the complaint of abdominal pain that had worsened for the last three days. Abdominal ultrasound was requested to exclude acute appendicitis and adnexal pathologies. Abdominal ultrasound did not detect any pathology. Doppler ultrasound performed during obstetric and gynecological examination of the patient showed a suspicious thrombus image in the right femoral vein and contrast-enhanced abdominal computed tomography was requested. The patient, who was found to have thrombus in the right iliac and femoral veins, was hospitalized due to venous thromboembolism. Conclusion: It is important for emergency physicians to keep venous thromboembolism in mind as a diagnosis in all patients (including young patients) presenting with abdominal pain.