Doctors advise when to seek care and how to manage diarrhea at home
Most diarrhea cases resolve in a few days with hydration, but doctors warn of warning signs that require medical attention and offer guidance on diet, medication and hygiene.
In the United States, tens of millions of people experience diarrhea each year, and recent reports note a rise in cyclosporiasis cases linked to contaminated produce. Gastroenterologist Benjamin Levy of the University of Chicago says most episodes subside on their own within three to four days, but certain symptoms should prompt a doctor’s visit.
Patients are advised to seek care if diarrhea lasts more than a week, is accompanied by fever of 101°F (38.3°C) or higher, contains blood or mucus, causes severe abdominal pain, or is associated with persistent vomiting. Dehydration is another red flag; reduced urine output despite fluid intake, light-headedness, confusion or dark urine warrant immediate medical attention. Older adults, people with kidney disease, weakened immune systems, recent hospital stays or recent antibiotic courses should have a lower threshold for consulting a clinician.
Levy recommends focusing on fluid replacement, using water, tea, sports drinks or over-the-counter oral rehydration solutions such as Pedialyte, which have a balanced sugar and salt content. He advises avoiding fatty, spicy, high-fiber foods, alcohol, caffeine, sugary drinks and artificial sweeteners, while suggesting bland options like broth-based soups, starchy foods, eggs and yogurt. Temporary lactose intolerance may occur, so dairy should be limited to yogurt.
For symptom relief, adults may use bismuth subsalicylate for a short period, noting that stool may turn black, a harmless effect. Loperamide can be considered only when there is no blood in the stool, no fever and no recent antibiotic use. All medications should be taken according to package directions and after consulting a health professional if underlying conditions exist.
To protect irritated skin, Levy suggests gently wetting toilet paper, using barrier ointments such as zinc oxide or petroleum jelly, and taking warm sitz baths. Over-the-counter creams containing hydrocortisone or lidocaine may help severe itching. He dismisses probiotics as ineffective for acute diarrhea.
If the cause is contagious, individuals can spread the infection for days to weeks after symptoms end, primarily via hand-to-mouth transmission. Handwashing with soap and water after bathroom use and before handling food, avoiding food preparation for others while ill, and staying home from work until recovery are recommended to prevent spread.