A 40-year-old woman attends the accident and emergency department (A&E) with her worst-ever headache. It started suddenly in the occipital area 5 h ago and was associated with nausea and vomiting and some photophobia. Her neck became stiff after around 2 h.

What is the likely differential diagnosis? *This case is from Docplexus editorial team for educative purpose only Source: Core Clinical Cases in Medical and Surgical Specialties Stay connected, the answer will be posted in next 48 hrs!