Incarcerated hernia mainly presents with severe abdominal pain, often manifested as persistent pain with paroxysmal exacerbation, without radiation to other areas.

It is accompanied by abdominal distension, nausea, and vomiting. The vomitus consists of gastric contents, without bile or coffee - ground substances, and there is a cessation of flatus and defecation.

Physical examination reveals an increase in local skin temperature. The hernia contents cannot be reduced, with obvious tenderness and increased tension.

An upright abdominal plain film may show air - fluid levels.

If the incarceration can be relieved in a timely manner, the blood circulation of the intestine can be restored, and the affected intestinal segment can return to normal.

If the incarceration cannot be relieved promptly, the arterial blood supply to the intestine will be cut off, leading to intestinal necrosis.