The reason why the erection time is not long may be related to the mental stress, circumcision, prostatitis and so on. 1. Mental stress: If the pressure is too high, the life routine is not regular, the work intensity is too heavy, resulting in easy fatigue, nervousness, anxiety and so on may cause temporary erection time is not long phenomenon. 2. Excessive foreskin: Due to the excessive length of the foreskin, the glans will be wrapped by the foreskin for a long time. As a result, the glans won’t be in direct contact with the outside world, which will make the glans more sensitive and lead to the phenomenon of not having a long erection. 3. Prostatitis: Chronic prostatitis can affect sexual function, resulting in a short erection. Prostatitis can cause edema of the prostate gland, pressing the erectile nerve at the top of the prostate gland, resulting in a short erection time. Symptoms such as frequent urination and urinary urgency will mainly occur. Patients with the phenomenon of erection time is not long, should go to the relevant hospital in time for consultation and treatment, so as not to cause serious adverse consequences after a long time of untreated.