Hello, Welcome to HealthcareMagic. Premature or early ejaculation can be caused by both psychological and pathological factors. Psychological factors are hesitation, anxiety, guilty feelings during masturbations. Pathological causes include abnormal hormone level, reflex activity of ejaculatory system, thyroid problems etc. Treatment includes psychological counseling, sexual therapy (squeezing the tip of penis during sexual intercourse to subside or delay ejaculation), antidepressants. In your case it can be psychological and dut to performance linked anxiety. Talk to your partner openly about any fears or apprehensions, eat nutritious healthy food, exercise regularly and cut down on smoking or alcohol if you are taking it. To exactly pinpoint a diagnosis you need to get a complete examination done from a urologist. Hope it helps you. Regards.