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Good afternoon, I am Dr Ruff, thank you for contacting us today
I am very sorry to hear of this. For Group 1 (car), for a chronic subdural, or acute on chronic, If treated surgically or not, you must NOT drive, and must inform the DVLA. They deem recovery is when you can drive, so likely to require a medical to assess for this.
Here is the current government website which documents this in regards ***** *****
I see, my apologies. So with a spontaneous subdural, it tends to be from cysts, vascular lesions, often structural causes or trauma. Intracranial hypertension is also a cause.
Therefore any vascular improvement is the main benefit, so controlling your own Blood pressure if it isn't, controlling vascular risk factors such as not smoking, reduce weight if over weight, reduce cholesterol if raised. These are the main factors you can control.
The reason you cannot get much information, is essentially down to a lot of unknowns, hence why we can only manage possible risk factors. Your imaging would have suggested if there was an obvious malformation that could have caused it.
Thank you. All the best with your recovery.