Hello, Thanks for using healthcaremagic. The erectile dysfunction(ED) is multifactorial problem and in most of the cases there are more than one factor which causes it. Yes the pot may be the factor for causing it but it is one of the rare cause of ED. There is possibility that you are having other problem like diabetes, hypertension or renal problem which is causing this problem. I do not say this is bigger problem as I know very little history about it. In my view you need to see a doctor to find out the cause as soon as possible before any permanent damage is done. If you feel ok with online thing you can post a direct query to me with complete details about the problem. I will be glad to assist you. Before that you need to stop smoking pot. Thanks and regards Dr Ashok Kumar