3~5 centimeters generally means 3~5 cm. Hidden pain in the area of about 3~5 cm below the navel may be related to enteritis, cystitis, urinary tract stones, as well as male prostatitis, female pelvic inflammatory disease, and so on. 1. Enteritis: an infectious disease of the mucous membrane of the intestinal tract, most often caused by improper diet or abdominal cold, in addition to pain in the lower abdomen, may also be accompanied by changes in stool characteristics, such as dilute stools, stools, etc. Increase in the number of times. 2. Cystitis: an acute infection of the bladder, which can be manifested in the clinic as a distended bladder area, and can be accompanied by frequent urination, urinary urgency, or urinary pain and so on. 3. Urinary tract stones: stones located in the lower ureter and bladder stones can irritate and cause pain in the lower abdomen, and there may also be signs of urethral irritation such as urinary urgency and urinary pain. 4. male prostatitis: this is a relatively common urological disease, with inflammatory factors stimulation leads to prostate congestion, edema and other factors, in the clinical mainly manifested in the abdomen distension discomfort, can be accompanied by urinary urgency and other discomforts. 5. Female pelvic inflammatory disease: it is an acute infectious disease that occurs in and around the female reproductive organs, which is mainly manifested as pain in the abdomen, accompanied by fever and other systemic symptoms. There are many reasons for the pain under the umbilicus, and you need to consult your doctor to avoid delaying your condition.