Aim:
The study aims to describe a clinical case and its management in the Hospital Emergency Department of a seventeen-year-old boy with posttraumatic internal hemorrhage into the pleural cavity during the late postoperative period following Nuss surgery.

Material and methods:
This paper presents a clinical case of a 17-year-old patient who was initially admitted to the Emergency Department (E.D.) of the District Hospital named after John Paul II in Bartoszyce, with a history of surgical treatment of pectus excavatum, after blunt chest trauma and in result hemorrhagic shock.

Case report:
On 5 May 2024, at 20:45, a seventeen-year-old boy presented to the Emergency Department with his mother, complaining of breathing difficulties. The boy reported that the problems had occurred while playing with friends approximately 30 minutes before the hospital visit. Patient underwent surgery to correct his funnel-shaped chest. The mother explained also that during play, a friend standing behind him squeezed her son tightly in the chest area.

Summary:
Although low-energy injuries usually do not cause significant health damage, the overall clinical impression, the ABCDE assessment, and a detailed patient history are crucial. Information about previous surgical procedures can be invaluable in identifying the source of an acute health threat. With access to EBM, the analysis should consider all possible causes—from the most common, through the rarest, to those not described in the medical literature but potentially possible.