Case study - subarachnoid hemorrhage. This is the case presentation of 31yo male who presents with the worst headache of his life after having sex. It is caused by bleeding in the space between the brain and the tissue covering the brain. It can happen from an aneurysm in most cases. In this case, an aneurysm was not found. Symptoms of a subarachnoid hemorrhage * a sudden severe headache unlike anything you've experienced before. * a stiff neck. * feeling and being sick. * sensitivity to light (