Penile erection is due to blood entering and retaining in sponge like bodies within the penis till there is sexual arousal.
is regular or repeated inability to obtain or maintain an erection.
There are many factors for erectile dysfunction. Smoking
is an important cause of erectile dysfunction.
Smoking causes arterial narrowing, resulting in erectile dysfunction.
Other causes of erectile dysfunction are:-
2. Some medicines like anti depressants
3. Performance anxiety
It will be helpful if you quit smoking. There are medicines which can cure erectile dysfunction, but they should be taken only under medical supervision as they can be harmful if taken in extra dose than needed.
I hope I am able to answer your query. If you have any doubts, I will be happy to help.