Hi
Hypothyroidism can itself be the cause of erection problems. Other causes that can be ruled out by laboratory means is male hormone level abnormalities, high cholesterol etc.
Next Steps
I would avice you have your male hormone levels measured- total
testosterone, free testosterone, SHBG levels,
LH,
FSH and
prolactin levels, fasting
lipid profile,
HBa1c. Have a strict control over
thyroid levels by frequent testing atleast onece in 3 months initially.
Health Tips
You could take L-Arginine sachets once per day for whatever benefit it may pprovide. If problem persist contact an urologist for a trial prescription of viagra or cialis.