Final answer:
The most common complication after the placement of a percutaneous endoscopic gastrostomy (PEG) tube is peristomal infection, characterized by signs like swelling, pain, and redness around the area where the tube enters the body.
Step-by-step explanation:
The most common complication seen after percutaneous endoscopic gastrostomy (PEG) tube placement is peristomal infection. This complication can occur when bacteria around the stoma, the area where the tube enters the body, lead to infection of the surrounding skin. It is important for patients with PEG tubes to monitor for signs of infection, which may include redness, swelling, pain, or discharge from the site. Ensuring proper hygiene and care of the PEG site is essential in preventing this common complication.