Pain below the navel during defecation is considered to be bladder inflammation, urinary tract infection, lower ureteral stones, and for men, there may be prostatitis, and for women, there may be gynecological inflammation. The bladder will contract during urination, and the contraction of the bladder forcing muscle will pull the lower part of the ureter. If there is a stone in the lower part of the ureter, it may stimulate pain below the navel, and pain will also occur below the navel when urinating under the stimulation of bladder inflammation, and it will be accompanied by frequent, painful and urgent urination. Men with prostate inflammation will have some prostate enlargement and swelling, which will stimulate the nerves around the prostate to produce pain below the navel when urinating. It is advisable to go to the hospital to determine the condition by laboratory tests of the prostate fluid, urinary routine, urinary ultrasound, and further treatment under the guidance of the doctor, usually pay attention to warmth, drink more water, and specific treatment according to the test results.