The onset of prostatitis is related to age, season, diet, sexual activity, genitourinary tract inflammation and so on. there is detail knowledge in following. Age-related: Prostatitis is 20 to 70 years old. Acute prostatitis occurs in young adults who are sexually active at the age of 30. There are two peaks in the incidence of chronic prostatitis in China, that is, the first incidence peak is 30 to 39 years old, the incidence rate is 34.4%, and the second incidence peak is 60-69 years old, the incidence rate is 36.4%. Climate related: lower temperature is induced chronic prostatitis. Therefore, there are more patients with prostatitis in the cold season of autumn and winter, and people with prostatitis will be aggravated at this time. Related to occupational factors and lifestyle: People who are prone to prostatitis include: professional drivers, office workers, coal mine workers, and college students. People with bad eating habits and lifestyles are also prone to prostatitis, such as spicy food, coffee and alcohol, smoking, sedentary for a long time, repeated long-distance riding and hail. Some diseases can cause prostatitis: for example, urethritis can induce or accompany prostatitis, and some people with acute prostatitis have had a "cold" or "respiratory infection" before the onset of illness. Psychosocial factors and prostatitis: People with prostatitis often have symptoms of anxiety and depression. At the same time, because some media excessively expand the harm of prostatitis, the mental and psychological symptoms of patients are aggravated, and the mental health impact of health sometimes exceeds the disease itself. Other factors and prostatitis: (1) sexual dysfunction and prostatitis. Some people with chronic prostatitis may have sexual dysfunction, and sometimes sexual dysfunction is the main symptom of the patient's psychological anxiety. (2) Sexual life and prostatitis. Whether the number of sexual life can cause prostatitis, there is no conclusion about this point.