This occurrence is called a subdural hematoma and can become life-threatening if left untreated. Abdominal hematomas are also serious and often manifest as blood in the urine or stool. A blood ...

A subdural hematoma, whose main symptom is a severe ... can cause unilateral weakness opposite to its location. Symptoms include difficulty breathing, loss of consciousness, bradycardia, nausea ...

But this process may last up to several months, depending on the hematoma's size. Subdural and epidural hematomas are serious neurological conditions that typically result from head injuries.