Thunderclap headache is a feature of
**Core Concept**
Thunderclap headache is a sudden, severe headache that reaches its maximum intensity within 1 minute, often described as the worst headache of a person's life. This condition is a medical emergency and requires prompt evaluation to rule out life-threatening causes.
**Why the Correct Answer is Right**
The pathophysiology of thunderclap headache involves the rupture of an aneurysm or the development of a subarachnoid hemorrhage, which leads to the sudden release of blood into the subarachnoid space. This results in a severe headache due to the stretching of pain-sensitive blood vessels and the irritation of the meninges. The sudden onset of the headache is thought to be due to the rapid increase in intracranial pressure.
**Why Each Wrong Option is Incorrect**
**Option A:** Migraine - While migraines can cause severe headaches, they typically do not reach their maximum intensity within 1 minute and are often accompanied by other symptoms such as nausea, vomiting, and visual disturbances.
**Option B:** Cluster headache - Cluster headaches are severe headaches that occur in clusters or cycles, but they typically last for 15-180 minutes and are accompanied by autonomic symptoms such as lacrimation and nasal congestion.
**Option C:** Tension headache - Tension headaches are mild to moderate headaches that are often described as a band or a squeezing sensation around the head, and are not typically as severe as thunderclap headaches.
**Clinical Pearl / High-Yield Fact**
In cases of thunderclap headache, it is essential to perform a non-contrast CT scan of the head to rule out subarachnoid hemorrhage, as this condition requires prompt medical attention to prevent further complications.