diarrhea risk reduction

Overview

Diarrhea means passing loose or watery stools more often than normal. It usually happens when your digestive system is irritated, often by an infection. Most cases get better on their own in a few days. Risk reduction means taking steps to lower your chances of getting diarrhea in the first place, especially from germs you might pick up from food, water, or other people.

Yes, diarrhea is extremely common. Most people have it at least once or twice a year. It is one of the top reasons for doctor visits worldwide.

Diarrhea can affect anyone, but young children, older adults, and people with weakened immune systems are more likely to get it and have complications like dehydration.

Symptoms

Common symptoms

• Loose or watery stools
• Needing to go to the bathroom often and urgently
• Stomach cramps
• Feeling bloated
• Nausea or vomiting
• A mild fever

Symptoms in children

• Less energy or acting more tired than usual
• Dry mouth or tongue
• No tears when crying
• Fewer wet nappies than normal
• Sunken eyes or sunken soft spot on the head
• Fussiness or irritability

Symptoms in older adults

• Dizziness or feeling lightheaded
• Weakness
• Confusion or being less alert
• Dry mouth and less urine than normal
• Faster heart rate

Causes

Main causes

• Viruses, such as norovirus and rotavirus
• Bacteria from contaminated food or water, like Salmonella or E. coli
• Parasites that can be picked up from unclean water or food
• Food poisoning from eating food that was not stored or cooked properly
• Side effects of certain medicines (but never stop a medicine without asking your doctor)
• Digestive conditions like irritable bowel syndrome or inflammatory bowel disease

Risk factors

• Travelling to areas with poor sanitation or unsafe drinking water
• Living in or visiting places with crowded conditions
• Not washing hands after using the toilet or before preparing food
• Eating undercooked or raw food that may carry germs
• Having a weakened immune system
• Taking antibiotics, which can upset the balance of good bacteria in your gut

When to see a doctor

See a doctor urgently if:

• Diarrhea that lasts more than a few days without getting better
• Signs of dehydration such as dizziness, dry mouth, or little urine
• Severe pain in your belly or rectum
• Stools that are bloody, black, or contain mucus
• Diarrhea in a baby, young child, or older adult that shows any warning signs

Book a routine appointment if:

• Diarrhea that keeps coming back or goes on for more than two weeks
• You have unintentional weight loss with diarrhea
• You have a chronic health condition like diabetes or inflammatory bowel disease
• You have recently travelled to a country with high rates of foodborne infection
• You are concerned about any change in your bowel habits

Diagnosis

A doctor will usually ask about your symptoms, how long diarrhea has lasted, what you have eaten recently, whether you have travelled, and any medicines you take. They may also check you for signs of dehydration.

Tests that may be done

• Stool sample to check for bacteria, viruses, or parasites
• Blood tests if they suspect an infection or inflammation
• Breath test for certain food intolerances (in long-term cases)
• A physical exam to check for abdominal tenderness or signs of dehydration

What to expect at your appointment

Most people do not need any tests. If your doctor suspects an infection or another cause, they will explain what tests they recommend and why. Results usually come back within a few days. Your doctor will tell you what to do in the meantime and when to follow up.

Treatment

The main goal is to prevent dehydration and let your gut recover. For most people, this means resting, drinking enough fluids, and eating bland food until symptoms pass. Some infections need treatment, but many clear up on their own.

Self-care at home

• Drink plenty of clear fluids: water, clear broth, or oral rehydration drinks available at your pharmacy.
• Sip fluids often rather than gulping large amounts at once.
• Eat small, bland meals like plain rice, toast, bananas, or boiled potatoes.
• Avoid dairy, fatty or spicy foods, and caffeine until you feel better.
• Rest as much as possible.
• Wash your hands thoroughly after using the toilet and before touching food.
• Do not share towels or personal items while you are unwell.

Medical treatments

Doctors sometimes prescribe rehydration salts to replace lost fluids and minerals. They may also recommend medicines that slow down diarrhoea, but these are not suitable for everyone and should only be used under medical advice. If a bacterial infection is confirmed, antibiotics may be prescribed. Never take anti-diarrhoea tablets without checking with a healthcare professional, especially if you have a fever or blood in your stools.

When is surgery considered?

Surgery is not needed for ordinary diarrhea. Only very rare complications, such as a severe gut infection that damages the bowel, might require surgery — and that is a decision made by specialists in a hospital.

Living with this condition

When you have diarrhea, your main tasks are to rest and stay hydrated. Keep track of how much you drink. If you feel dizzy, weak, or have sunken eyes, seek medical help promptly. If you are caring for someone with diarrhea, help them drink fluids and wash your hands often.

Lifestyle tips

• Drink clean, safe water — if unsure, boil it or use bottled water.
• Wash your hands regularly with soap and water, especially after using the toilet and before cooking.
• Prepare food safely: cook meats thoroughly, wash fruits and vegetables, and keep raw and cooked foods separate.
• Avoid swallowing water from pools, lakes, or rivers.
• If you travel, follow food and water safety advice for the region.

Diet and exercise

While you have diarrhea, rest your bowels with light, plain foods. Once you recover, gradually return to your normal diet. Gentle exercise like walking can help you regain strength, but strenuous exercise may not be wise until you are fully rehydrated and feeling better.

Mental health and emotional wellbeing

Having diarrhea can be stressful, embarrassing, and tiring. It may disrupt work, school, or travel plans. If you feel anxious about it, or if ongoing bowel problems are affecting your mood, talk to your doctor. You do not have to manage it alone.

Prevention

You cannot always prevent diarrhea, especially if it is caused by a virus, but you can greatly lower your risk with good hygiene, safe food and water practices, and being careful when you travel to places with poor sanitation.

Vaccines

Rotavirus is a common cause of severe diarrhea in young children, and there is a vaccine against it as part of routine childhood immunisation in many countries, including the UK. Ask your health visitor or GP about vaccination schedules. There is also a vaccine for cholera, which is recommended for some travellers to high-risk areas — ask your doctor or travel clinic.

Screening programmes

There is no routine screening for diarrhea itself. If you have long-term gut symptoms, your doctor may suggest tests to look for underlying conditions, such as coeliac disease or inflammatory bowel disease, but that is based on your individual situation.

Complications

If left untreated

• Dehydration, which can be serious and may require hospital fluids
• Electrolyte imbalances that affect your muscles and heart
• Kidney problems from severe fluid loss
• Malnutrition, especially in young children or older adults
• Complications from an underlying infection if it spreads

Long-term outlook

The vast majority of people with diarrhea recover completely within a few days without any long-term problems. With proper fluids and rest, your gut heals quickly. If you take the right precautions and seek help when you need it, you can reduce your risk and manage diarrhea well.

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