Which of the following is NOT an emergency that requires an ER visit?

The choice of a common headache as the answer highlights a situation that typically does not necessitate an urgent visit to the emergency room. While headaches can be a symptom of various conditions, the majority of common headaches are not life-threatening and can often be managed with over-the-counter pain relievers and rest.

In contrast, the other scenarios present more acute conditions that may require immediate medical attention. Cuts that stop bleeding but may need stitches can lead to infections or the need for closure to promote healing. Shaking and chills without a fever could indicate an underlying infection or other health issue needing assessment at a hospital. Burns that blister can signify a more severe injury, potentially leading to complications, thus requiring medical intervention.

Considering these distinctions helps clarify why a common headache is less likely to require emergency care compared to the other options presented.