During a second pregnancy, the timing of when you start showing can vary from woman to woman. In general, women tend to show earlier in subsequent pregnancies compared to their first. This is because the abdominal muscles have already been stretched and may be more relaxed. Additionally, the uterus expands more quickly in subsequent pregnancies as it has already undergone changes before. Some women may start showing as early as 12 weeks, while others may not show until around 16-20 weeks or even later. It's important to remember that every pregnancy is different and factors such as body type, weight gain, and muscle tone can also play a role in when you start showing. If you're unsure whether your bloating is due to pregnancy or other factors, it's best to consult with your healthcare provider for confirmation and guidance.