Good morning sir. Dear sir i have a sexual...

What are the causes of erectile dysfunction ?
in your case , Diabeties are the most possible predisposing cause of your current erectile dysfunction , but other causes may contribute your medical condtion such as : 
1. Aging
2. Low testosterone
3. bad life style such as low exercise and smoking 
4. Side effects of medicines you are taking, such as medicines for high blood pressure
Treatment of erectile dysfunction :
- A urologist is first consulted to diagnose the condition and conduct medical tests, and along with the condition , any preexisting medical conditions such as daibeties should be controlled and treated , and treatment options for erectile dysfunction depends on the cause , such as :   low testosterone, the main treatment It is an hormone replacment therapy and there are several medical forms, such as pills, patches, injections, etc., and in general a dose of 100 - 400 ng / dL is prescribed weekly or given gradually and the doses are given over a period of 6 - 12 months. in the absence of chronic disease conditions and the presence of general weakness in the body and erectile dysfunction, vitamin supplements such as medicine are prescribed Centrum, and ED drugs such as Viagra are prescribed (the specialist will advise you on how to use the dose and the most appropriate dose for you)
- In the event that there is psychological pressure or a bad relationship with a sexual partner, you will be referred to a psychological counseling doctor
needed test :
physcial examination and Testosterone level test , and in some cases , imaging US test may be conducted  to detect any abnormalities in the reproductive system, such as atrophy of the testicles