Scattered foci of increased T2/Flair signals indicate small vessel ischemic disease or changes of brain blood vessels. These changes are seen in multiple sclerosis, Alzheimer's or Wilson's Disease, migraine headaches, diabetes, high blood pressure and high cholesterol. Though they are of no immediate threat, all these causes, and the presence of ischemic changes can be a risk factor for future stroke. Hypoplastic vertebral artery also increases risk of stroke. Hence, prevention methods should include a healthy lifestyle, and a combination of diet, exercise, and medicines. Please discuss with your treating doctors. Take care!
The medical advice given should not be considered a substitute for medical care provided by a doctor who can examine you. The advice may not be completely correct for you as the doctor cannot examine you and does not know your complete medical history. Hence this reply to your post should only be considered as a guiding line and you must consult your doctor at the earliest for your medical problem.