I am not aware of exuberent masturbation as being a cause of ED. If the libido isn't low, then it isn't likely a hormonal problem (i.e. low testosterone). You may want to obtain these levels just to check.
Extensive alcohol use can cause neuropathy in some cases. Electrodiagnostic testing by a neurologist may be considered if this is suspected by your personal physician.
I would also do a vascular check (i.e. checking groin pulses, ultrasound of the penis to evaluate any vasculature problem). If you are experiencing stabbing pain in the testicles, you may want to obtain a scrotal ultrasound as well to evaluate any acute scrotal conditions.
One of the more comprehensive tests is nocturnal penile tumescence testing, which can quantify whether erectile dysfunction is impaired or not. This can be discussed with your personal physician.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
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