Hello, Thanks for using healthcaremagic. The most common cause is psychological which occurs due to fear of performance anxiety which starts due to inadequate sexual knowledge or due to occasional failure. In your case it is likely cause as you were under intense pressure to satisfy your partner. It can be treated with help of counseling by a psychologist or psychiatrist. The other common casues are systemic illnesses such as hypertansion, diabetes, cardiac problem, high lipids etc. This can be treated with appropriate medications by a physician. Having said this meet a doctor in your city to get examined to identify the cause of problem. Once it is done the treatment is available for almost all causes. I hope this helps you in taking right step. Thanks and regards