What is a common symptom associated with a subarachnoid hemorrhage?

A common symptom associated with a subarachnoid hemorrhage (SAH) is a thunderclap headache, which is described as a sudden, severe headache that reaches its peak intensity within seconds. This type of headache is often characterized as the worst headache of the patient's life and is typically a warning sign of bleeding in the subarachnoid space.

The sudden onset is significant because it distinguishes a thunderclap headache from other types of headaches, such as those that develop gradually. In a subarachnoid hemorrhage, the headache often arises abruptly due to the sudden release of blood into the cerebrospinal fluid, leading to irritation of the meninges and the sensation of an intense headache.

Other symptoms of subarachnoid hemorrhage may include neck stiffness, nausea, vomiting, and altered level of consciousness, but the hallmark symptom is indeed the thunderclap headache. This description is crucial for recognition and prompt management of SAH, as emergency care is essential to reduce the risk of complications.