Final answer:
A severe headache can cause symptoms such as blurred vision, edema of face and hands, and epigastric pain.
Step-by-step explanation:
A severe headache can present with various symptoms, including:
- Blurred vision: The individual may experience difficulty focusing or have a loss of clarity in their vision.
- Edema of face and hands: Swelling in the face and hands can occur due to increased fluid retention caused by certain types of severe headaches.
- Epigastric pain: Some individuals may experience pain or discomfort in the upper abdomen, also known as epigastric pain.
Therefore, the correct answer is: 4) All of the above.