**Core Concept**
Lipodystrophy is a condition characterized by abnormal distribution of body fat, often seen in patients with insulin therapy. It can manifest as either lipoatrophy (loss of fat) or lipohypertrophy (accumulation of fat). In diabetic patients, lipodystrophy can lead to decreased insulin absorption and increased risk of complications.

**Why the Correct Answer is Right**
To avoid lipodystrophy, it is essential to rotate the injection sites regularly. This is because repeated injections at the same site can cause inflammation and lead to lipodystrophy. Rotating the sites ensures even distribution of insulin and minimizes the risk of lipodystrophy. This can be achieved by using an insulin injection log to track the sites used and ensuring that no site is used more than once a week.

**Why Each Wrong Option is Incorrect**
**Option A:** Using a needle with a larger gauge does not prevent lipodystrophy, as the size of the needle does not affect the distribution of fat.
**Option B:** Insulin type is not directly related to the development of lipodystrophy. Any type of insulin can cause lipodystrophy if injected at the same site repeatedly.
**Option C:** Not using an insulin pump does not prevent lipodystrophy, as the risk of lipodystrophy is related to the injection site, not the mode of insulin delivery.

**Clinical Pearl / High-Yield Fact**
Always use an insulin injection log to track the sites used and rotate the sites regularly to minimize the risk of lipodystrophy.

**Correct Answer: C. Not using an insulin pump does not prevent lipodystrophy, as the risk of lipodystrophy is related to the injection site, not the mode of insulin delivery.