Hi, Thanks for using HCM. Erectile dysfunction can be due to multiple causes like psychological problem, hormonal imbalance, nerve problem, spinal cord problem, vascular problem or neurological problem. But you dont mentioned any of them and since you only started believing erectile dysfunction, consult your doctor for examination and diagnosis. If early morning erection is not there then the cause may be due to testosterone. Maintain your daily healthy activities like outdoor exercise, diet, fruit juice, avoiding tight pants, reducing frequency of mastrubation (If doing), always thinking of sexual activities. This will help you. Hope I answered your question. Feel free to ask me if you have any further queries. Wish you good health. Take care. Regards Dr. Lohit