**Core Concept**
The early postoperative complication of ileostomy is often related to the mechanical and physiological challenges associated with the creation of a stoma, including issues with bowel function, wound healing, and management of the stoma.

**Why the Correct Answer is Right**
The most common early postoperative complication of ileostomy is **ileus**, which is a temporary halt in bowel function due to the surgical manipulation of the bowel. This can be caused by factors such as ischemia, edema, and adhesions. The ileus can lead to nausea, vomiting, abdominal distension, and constipation. In some cases, the ileus can be managed conservatively with bowel rest, hydration, and electrolyte replacement, but in severe cases, it may require surgical intervention.

**Why Each Wrong Option is Incorrect**
**Option A:** **Wound infection** is a possible complication of ileostomy surgery, but it is not the most common early postoperative complication. Wound infection typically presents with signs of inflammation, such as redness, swelling, and purulent discharge.
**Option B:** **Dehiscence** is a possible complication of ileostomy surgery, but it is not the most common early postoperative complication. Dehiscence typically presents with signs of wound failure, such as separation of the wound edges and leakage of stool or urine.
**Option C:** **Obstruction** is a possible complication of ileostomy surgery, but it is not the most common early postoperative complication. Obstruction typically presents with signs of bowel obstruction, such as abdominal pain, nausea, vomiting, and constipation.

**Clinical Pearl / High-Yield Fact**
The most important factor in preventing early postoperative complications of ileostomy is proper patient selection and preoperative counseling. Patients with a history of abdominal surgery, radiation, or inflammatory bowel disease are at higher risk for complications and should be carefully evaluated before undergoing ileostomy surgery.

**Correct Answer:** A. Ileus