A number of biological factors might contribute to premature ejaculation, including:
- Frenulum Breve – a tight band of tissue connecting the glans (head of the penis) to the shaft of the penis on its underside. When the frenulum is tight or short this is called a frenulum breve.
- Abnormal hormone levels.
- Abnormal levels of brain chemicals called neurotransmitters.
- Inflammation and infection of the prostate or urethra.
- Inherited traits.
- Erectile dysfunction.