Can untreated subdural hematoma cause brain damage? if so would it be immediate or months or years?

Subdural hematoma: It is size dependent if untreated. I suspect your doctor felt small. Damage caused by pressure on brain..Symptoms usually within 48 hrs altho case from chicago childrens caused symptoms over a week later. Symptoms can be as as mild as headace altho rare or difiiculty using opposite side of body or signs of increased brain pressure such as lethargy and vomiting.