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Published on: 7/15/2026

How long does diarrhea typically last in a salmonella infection, and when should you seek medical attention?

Yoshinori Abe

Reviewed by Yoshinori Abe, MD

Internal Medicine

Salmonella-related diarrhea typically lasts 4 to 7 days and often resolves on its own without treatment. However, you should seek medical attention if diarrhea is severe, persists longer than a week, or is accompanied by warning signs such as a high fever (over 102°F), bloody stools, persistent vomiting, or signs of dehydration like dizziness, dry mouth, or reduced urination. Infants, older adults, pregnant women, and people with weakened immune systems face higher risks of complications and should consult a doctor sooner.

Not sure if your symptoms point to Salmonella or something else? Since many gastrointestinal illnesses share overlapping symptoms, getting clarity early can help you decide whether home care is enough or if medical attention is needed. Take a free, instant, online symptom check to better understand what may be causing your symptoms and get personalized guidance on your next steps.

Reviewed for medical accuracy: 07/14/2026

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Important Next Steps

Learn if your diarrhea needs care todayDiscover likely causes of persistent diarrheaSee if salmonella is causing symptomsFind OTC relief for diarrhea symptomsFind a doctor for diarrhea treatmentUnderstand safe home remedies for diarrheaFind out if salmonella needs urgent care

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Explanation

Salmonella infections can cause diarrhea that typically lasts from a few days to about a week. However, in some cases, the diarrhea can be more severe and last longer. It is important to pay attention to how you are feeling.

When to Seek Medical Attention:

  • If the diarrhea is very watery or bloody.
  • If it lasts more than a week.
  • If you have a high fever.
  • If you feel very weak or dizzy, which could be signs of dehydration.

Important Notes:

  • Salmonella can be more serious in very young children and older adults.
  • If you or someone you know is in these age groups and has symptoms, it is a good idea to see a doctor.
  • Always remember to drink plenty of fluids to stay hydrated.

If you have any concerns or your symptoms get worse, you can use Ubie's free AI-powered symptom checker to help assess your condition and determine whether you need to talk to a healthcare professional.

(References)

  • Khoshoo V, Raj P, Srivastava R, & Bhan MK. (1990). Salmonella typhimurium-associated severe protracted .... Journal of pediatric gastroenterology and nutrition, 2182815.

  • Stutman HR. (1994). Salmonella, Shigella, and Campylobacter. Pediatric annals, 7838603.

  • Nelson SJ, & Granoff D. (1982). Salmonella gastroenteritis in the first three months of life. A .... Clinical pediatrics, 7140121.

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