Which of the following is a symptom that differs between migraines and tension headaches?

Nausea and vomiting are indeed symptoms that distinctly differentiate migraines from tension headaches. Migraines are often accompanied by gastrointestinal symptoms, such as nausea and vomiting, due to their nature as a neurovascular condition. This association is thought to arise from the fact that migraines involve changes in brain chemistry and trigger the release of inflammatory substances that can affect the gastrointestinal system.

In contrast, tension-type headaches typically do not present with these symptoms. Instead, they are characterized by a steady, non-throbbing pain, often described as a tight band around the head. This fundamental difference in accompanying symptoms is a key factor in diagnosis and management, helping healthcare providers distinguish between the two types of headaches and tailor appropriate treatment strategies.

While the other choices reflect aspects that may vary between headache types, they do not provide a clear symptomatic difference as pronounced as nausea and vomiting when comparing migraines and tension headaches.