Headaches, blurred vision and fatigue

Migraine can affect vision before or during head pain and may leave you tired afterward. Low blood sugar can cause tiredness, sweating, shakiness, hunger, dizziness, or difficulty concentrating, particularly in someone using diabetes treatment. High blood pressure or diabetes can affect vision and should be checked rather than guessed from symptoms. Dehydration, poor sleep, eye strain, and illness may also cause overlapping complaints. The combination does not point to one diagnosis.

Record whether blur affects one or both eyes, whether it is sudden or gradual, and whether it clears. Note weakness, facial droop, speech difficulty, imbalance, fainting, chest pain, fever, vomiting, and medicine changes.

Stop driving and sit somewhere safe while vision is blurred. Rest your eyes, drink water, and eat a regular snack if you may have missed food. If you have diabetes and can check glucose, follow your personal sick-day or low-glucose plan; do not change prescribed doses without clinical advice. Arrange prompt medical review for a new combination or repeated episodes. Bring your medicines and any home readings.

Call emergency services for sudden blurred or lost vision, a sudden severe headache, one-sided weakness or numbness, facial drooping, trouble speaking, confusion, fainting, or severe imbalance. Seek urgent care for eye pain, repeated vomiting, fever with a stiff neck, or symptoms after head injury. Do not wait for symptoms to settle if they are abrupt or rapidly worsening.

Ask whether you need blood pressure, glucose, eye, or neurological checks, and whether the timing fits migraine or another condition. Explain your vision changes precisely and mention pregnancy, diabetes, recent illness, and every medicine or supplement.