Thanks for using HCM, I understand your concern and will try to give you my medical advice, you have an important intracranial vascular malformation your frequent headaches could be a symptoms of a rise pressure in your veins, regularly the venous angioma is associated with other malformations. I think a regular medical check is determinant for avoid some complications considering where located is, just try to avoid the stress and keep a healthy lifestyle. Take care and I hope has been helpful