**Core Concept**
Stoma complications are a significant concern for patients undergoing surgical procedures such as colostomy or ileostomy. One of the known complications is the development of a stoma-related hernia, which can lead to discomfort, pain, and potentially life-threatening consequences if left untreated.

**Why the Correct Answer is Right**
A stoma-related hernia occurs when the abdominal wall weakens around the stoma site, allowing intestine or other abdominal contents to protrude through the hernia sac. This can be due to increased intra-abdominal pressure, poor wound healing, or inadequate stoma site preparation. The hernia can be further complicated by bowel obstruction, incarceration, or strangulation, which may require emergency surgical intervention.

**Why Each Wrong Option is Incorrect**
**Option A:**
This option is not a known complication of stoma. While skin irritation and excoriation are common issues with stomas, they are not typically classified as a major complication.

**Option B:**
This option is incorrect because parastomal hernia is a recognized complication of stoma formation, but it is not the only one. Other complications such as stenosis, retraction, and prolapse also exist, but parastomal hernia is a specific concern.

**Option C:**
This option is incorrect because parotitis is an inflammation of the parotid gland and is not directly related to stoma formation or complications. While patients with stomas may experience various systemic or local complications, parotitis is not a known stoma-related issue.

**Option D:**
This option is incorrect because parastomal abscess is a possible complication of stoma, but it is not the only one. While an abscess can form around the stoma site, it is not as commonly recognized as a major complication as parastomal hernia.

**Clinical Pearl / High-Yield Fact**
When managing patients with stomas, it's essential to monitor for signs of stoma-related hernias, such as a bulge or swelling near the stoma site, and to educate patients on proper stoma care to prevent complications.

**Correct Answer:** B. Parastomal hernia.