Low libido in men may be related to factors such as increasing age, stress, smoking and alcohol abuse. Specific analysis is as follows: 1. Increasing age: as age increases, it will lead to a decrease in the secretion of androgen, thus inducing the phenomenon of decreased sexual function. At this time, usually not accompanied by other adverse symptoms, generally belong to the normal physiological phenomenon. 2. Excessive pressure: If the work pressure, mental pressure is too large, the body can not get enough rest, may also appear the symptoms of decreased libido. 3. Smoking and alcoholism: If there are bad behavioral habits, such as long-term smoking and alcoholism, it may also induce a series of undesirable symptoms, but also easy to lead to low libido. There are many reasons for low libido in men, and it is recommended that patients go to the hospital in time for treatment of the cause.