Classic migraines may be accompanied by symptoms other than a headache. Some people experience visual disturbances and sensory symptoms known as “aura” before pain hits.

According to the American Migraine Association, aura symptoms are often progressive and usually end once your headache begins, although they may remain until your headache is gone. Aura symptoms may include:

• blurry vision
• light sensitivity
• vision loss
• seeing zigzags or
  squiggly lines
• numbness
• tingling
• weakness
• confusion
• difficulty
  speaking
• dizziness
• diarrhea
• vomiting
• abdominal pain

Silent migraines occur when you have aura symptoms without a headache. They typically last from a few minutes up to an hour. Some people have chronic migraines that last for days, weeks, or months, but this isn’t typical for silent migraines

source Healthline.org