Premature ejaculation is the term used when you achieve orgasm very soon after putting your penis inside your partner or even before penetration. It is associated with ejaculation within a minute of penetration, difficulty in delaying ejaculation and finding sex distressing.
It can be caused by stress, inflammation of the prostate, nervous system disorders or it can be a side-effect of medicines. It can be helped by certain techniques used during sex, psychological treatments, creams or sprays that numb the penis and, very occasionally, surgery.
Please visit the following site for further information regarding the condition: patient.info/health/premature-ejaculation-leaflet