Diarrhea duration varies depending on its type and underlying cause:

• Acute (short-term) diarrhea typically lasts 1 to 2 days and often resolves on its own without treatment. It can sometimes last up to 2 weeks, especially if caused by infections like viruses or bacteria

• Persistent diarrhea lasts between 2 and 4 weeks. This form may result from bacterial or parasitic infections or medication side effects

• Chronic (long-term) diarrhea lasts more than 4 weeks. It is usually linked to underlying health conditions such as irritable bowel syndrome, inflammatory bowel disease (Crohn’s disease or ulcerative colitis), celiac disease, or food intolerances

In most cases, acute diarrhea resolves within a few days (1–7 days), with adults and children typically recovering within 5 to 7 days

. If diarrhea lasts longer than 2 days or is accompanied by dehydration, fever, bloody stools, or severe pain, medical evaluation is advised

. Treatment generally focuses on replacing lost fluids to prevent dehydration, and antibiotics may be needed if a bacterial infection is identified

. Summary:

Type of Diarrhea| Typical Duration| Common Causes
---|---|---
Acute (short-term)| 1–2 days, up to 2 weeks| Viral or bacterial infections
Persistent| 2–4 weeks| Infections, medication side effects
Chronic (long-term)| More than 4 weeks| IBS, IBD, celiac disease, allergies

Most diarrhea cases are short-lived and mild, resolving within a few days with proper hydration and care