Dear service user Thank you for writing to healthcaremagic. I understand that you are disturbed a lot regarding erectile dysfunction. You did not mention your age or since how long you are having this problem or any other relevant information in your question. There are several causes of insufficient erections. The common reasons are 1. Diabetes (nerve damage and vessels narrowing) 2. Some medicines like anti depressants and anti psychotics 3. Performance anxiety (the most common reason) 4. Psychiatric disorders (depression, anxiety) 5. Alcohol use (nerve damage and testicular injury) 6. Smoking (vessels narrowing) 7. after some surgical procedures (nerve damage). Let me know whether you achieve and maintain a good quality of erection in sleep, in the early morning, during masturbation but not at the time of coitus? If you are able to achieve and maintain erection in any one of the above mentioned situations than your problem is more likely psychological rather than physical. I recommend you to see a trained psychiatrist who is well versed with psycho sexual therapies. There are potential effective treatment options for erectile dysfunctions. There are effective behavior therapies and medications and surgical techniques for it. A psychiatrist will help you to find BEST SUITED FOR YOU. I hope this will help you. Do not lose hope and get well soon. Wish you good sexual health ahead.