Hello
Small hyperintense focus in deep white matter of brain may be due to ischemic changes resulting from involvement of small blood vessels(vasculitis),
demyelination,post lyme infection,post traumatic etc.
Ischemic changes resulting from blood vessels changes in diseases like
hypertension,
diabetes mellitus,dyslipidemia.
So,you need monitoring of conditions that leads to ischemic changes like hypertension,altered
lipid profile,diabetes mellitus so that further progression of disease can be halted.
You need investigations like routine hemogram,RBS,LFT,RFT,Lipid profile,ultrasound of abdomen.
Proper treatment depend upon findings.
You also need follow up scan. Multiple sclerosis(MS) is associated with many findings,it need clinical correlation.
Take Care
Dr.Indu Bhushan