The main reasons for the feeling of wanting to defecate when urinating are the following: 1. Acute enteritis, especially enteritis caused by dysentery bacillus infection, due to the heavy damage to the intestinal mucosa caused by the bacterium, the symptoms are mainly urgent and heavy, that is, the desire to defecate but the defecation does not come out. The contraction of the urethral sphincter during urination will stimulate the anal sphincter, and the feeling of wanting to defecate will appear. 2. urinary tract infection, mainly due to various causes of ureteral, bladder and urethral infections, the main manifestation of which is a positive bladder irritation sign, the irritation can involve the perineum and anus, and thus the feeling of wanting to defecate. 3. prostatitis, due to the infection of the prostate gland resulting in prostate congestion, enlargement,