**Core Concept**
The most common complication of ileostomy is related to the management of the stoma and the surrounding skin, which can lead to various issues such as skin irritation, infection, or leakage. This is due to the high output of the ileostomy, which can cause irritation and damage to the surrounding skin.

**Why the Correct Answer is Right**
The correct answer is **Option B: Skin complications**. This is because the high output of the ileostomy can cause skin irritation and damage, leading to complications such as skin excoriation, dermatitis, or even peristomal abscesses. The skin around the stoma is also more susceptible to infection due to the high moisture content and the presence of bacteria. The ileostomy output is high in volume and electrolyte content, which can cause irritation and damage to the surrounding skin.

**Why Each Wrong Option is Incorrect**
**Option A:** **Option A: Obstruction** is incorrect because while obstruction can occur in ileostomy patients, it is not the most common complication. Obstruction is usually due to a mechanical issue or a problem with the stoma, but it is not as common as skin complications.

**Option C:** **Option C: Intestinal obstruction** is incorrect because, although intestinal obstruction can occur, it is not the most common complication of ileostomy. Intestinal obstruction is a more serious condition that requires immediate medical attention, but it is not as common as skin complications.

**Clinical Pearl / High-Yield Fact**
It is essential to manage the skin around the ileostomy properly to prevent skin complications. This includes using a well-fitting ostomy pouch, applying a protective barrier cream, and maintaining good hygiene.

**Correct Answer: B. Skin complications**