Morning erection is a normal male physiological phenomenon, generally men from am 4:00 to 7:00 in the morning will unconsciously appear erection of the penis, usually men appear morning erection means that sexual function is better, if there is no morning erection for a long time, it is necessary to find the cause and take effective measures in time, otherwise it may affect the sexual function of men. What is the sudden disappearance of the morning erection? 1, the body androgen reduction When the amount of androgen secretion in the male body decreases, most men will have no morning erection. Because sufficient androgen is the key to maintain normal sexual function, if androgen secretion is insufficient, men are unable to maintain normal sexual function, at this time need to promptly treat the problem of declining hormone levels. 2、Impotence If a man suffers from impotence, he will not have morning erections. Impotence means that a man's penis cannot get an erection or has a weak e...