What causes swelling and pain on the left side of the navel?

The swelling and pain on the left side of the navel may be caused by ulcerative colitis, descending colon cancer, left ureteral stone and other diseases.
1. Ulcerative colitis: it is a kind of inflammatory bowel disease, which occurs in sigmoid colon and rectum, and mainly manifests as recurring diarrhea, mucus, pus and blood stools, abdominal pain, abdominal distension and other symptoms, which can cause distension and pain on the left side of the navel.
2. Descending colon cancer: malignant tumor occurring in descending colon, mainly manifesting as change of bowel habit and character, abdominal pain, abdominal distension, abdominal mass, anemia, low-grade fever and other symptoms, which can also cause swelling and pain on the left side of navel.
3. Left ureteral stones: stones occurring in the left side of the ureter, mainly manifested as lumbar cramps, hematuria and other symptoms, some patients may be manifested as lumbar pain, distension, which can cause swelling and pain in the left side of the navel.
There are many other causes of distension to the left of the navel, which should be emphasized, timely consultation, identify the cause of the disease, and follow the doctor’s instructions for further treatment or therapy.