The mechanism behind an erection involves nerve signals sent from the brain to the penis, which in turn increases blood flow to this region causing the penial tissue to expand and harden. Any factor that affects nerve transmission and blood flow to the penis can reduce the ability of the penis to stay erect, contributing to erectile dysfunction.
This means there are a wide range of causes of Erectile Dysfunction, including:
- Conditions affecting blood flow to the penis e.g. cardiovascular disease
- Conditions affecting nerve transmission to the penis e.g. Parkinson’s Disease
- Conditions affecting hormone levels e.g. thyroid disease
- Conditions affecting structure of the penis
- Decreased Libido
- Lack of exercise and obesity, smoking, high cholesterol and excessive alcohol