- Are usually described as throbbing
- Occur during or after strenuous exercise
- Affect both sides of the head in most cases
- Secondary exercise
- headaches may cause:
- The same symptoms as primary exercise headaches
- Vomiting
- Loss of consciousness
- Double vision
- Neck rigidity
- Bleeding in the area between the brain and the thin membranes that cover the brain (subarachnoid hemorrhage)
- Abnormalities in a blood vessel leading to or within the brain
- Cancerous or noncancerous tumours
- Obstruction of cerebrospinal fluid flow
- Sinus infection
- Structural abnormalities in the head, neck or spine
- Risk factors