(Kelly of the Clue Crew shows a brainy animation on the monitor.)  When cerebral arteries become dilated, it can often lead to this vascular pain also known as cephalalgia
- School Science [PAR] Vascular disease, smoking, diabetes, trauma to the spine, drug abuse and ... 
Often, these can go untreated because the man suffering from ED is too ... from 
the brain cause the release of nitric oxide (NO) into these arteries.