Why is there vomiting in subdural hematomas?

Vomiting in subdural hematomas is primarily caused by increased intracranial pressure (ICP) and irritation of the brain. As the hematoma expands, it can compress surrounding structures, leading to symptoms such as headache, nausea, and vomiting. Additionally, the brain's vomiting center can be stimulated due to the injury or pressure changes, triggering the vomiting reflex. This symptom is often indicative of more severe underlying brain injury.