Background: Traumatic hemothorax is defined as the accumulation of blood between the visceral and parietal pleura following trauma. The mechanism of injury (MOI) can vary from blunt chest trauma and penetrating injuries, such as stab wounds, to falls or motor vehicle accidents. Late hemothorax is a rare complication, with reported prevalence rates of up to 12%. Case Presentation: We present the case of a 64-year-old female who sustained blunt chest trauma with an initially normal chest X-ray. She reported a few days later with new radiographic changes initially misinterpreted as infection and was discharged. On subsequent presentation, she was found to have a large hemothorax requiring intercostal chest drain insertion. Conclusion: This case highlights the importance of maintaining a high index of suspicion for delayed hemothorax, even when initial imaging is normal. Clinicians should provide appropriate safety-netting advice and consider repeat or advanced imaging if symptoms persist or worsen.