Diarrhea is usually mild, but certain symptoms require medical attention. Seek help if diarrhea lasts more than three days, becomes severe, or is accompanied by high fever, dehydration, or blood in stools. Persistent vomiting, extreme weakness, or signs of dehydration like dry mouth and reduced urination are also warning signs. Infants, elderly individuals, and those with weakened immunity should be especially cautious. While medications like nizonide 500mg may be prescribed for specific infections, self-medication is not advised. Always consult a healthcare professional to determine the underlying cause and receive appropriate treatment before complications develop or the condition worsens significantly.