Sudden severe abdominal pain, particularly with vomiting, significant swelling, or inability to pass stool or gas, requires urgent evaluation.

4. Unexplained Weight Loss

Losing weight without intentionally changing your diet or exercise routine can be a warning sign of many different health conditions.

Cancer is one possibility, but it is far from the only explanation.

Persistent unexplained weight loss may occur because illness affects appetite, digestion, metabolism, or the body's overall energy requirements.