Causes of premature ejaculation can be divided into two main categories namely physical and emotional. Hypersensitive penis, greater penile representation in the cortex of the brain and neurotransmission disturbances can be the cause for the former. Anxiety and depression can be the reason for the latter. Various organic conditions such as neurological disorders affecting conus medullaris and acute bacterial prostatitis can also lead to premature ejaculation.
Besides these, various health related issues like high blood pressure, cardiovascular diseases, diabetes, disfigured sex organs and obesity can cause premature ejaculation. If you take strong allopathic drugs, there are high chances of you suffering from the same. Make sure that you consume less alcohol and control smoking also as these two habits can result in early ejaculation.
Another main cause that affects younger men more than older men is stress. Men who are going through a bad phase in their lives due to marital discord or work related anxieties are more likely to suffer from premature ejaculation.