Diarrhea means more frequent, softer, or liquid bowel movements and is usually the sign of a brief gastrointestinal infection. As a rule, the symptoms subside on their own within a few days. The most important thing during this time is to drink enough fluids.
Possible causes
Gastrointestinal infection
Viruses or bacteria cause temporary irritation of the intestines. Diarrhea is the body's natural response to expel pathogens.
Diet and intolerances
Spoiled food, unfamiliar foods, or intolerances such as lactose intolerance can trigger diarrhea. Very fatty meals also play a role.
Stress and other influences
Persistent tension or excitement can speed up digestion. Sometimes irritable bowel syndrome is also the underlying cause.

Typical steps at the doctor's office
- 1During the consultation, the duration, frequency, stool consistency, and possible triggers such as travel or food will be discussed.
- 2Your abdomen will be examined and your general condition assessed to evaluate your fluid balance.
- 3If diarrhea persists for a longer period, a stool or blood test may be useful for further assessment.
What you can do yourself
- Drink regularly. In the case of more severe diarrhoea, vomiting, or an increased risk of dehydration, oral rehydration solutions (ORS) from the pharmacy are suitable, because they replace water AND salts in an appropriate composition — water and unsweetened tea mainly replace fluid.
- Start with light, easily digestible foods such as rice, rusks, or soup.
- Avoid very fatty, heavily spiced, or gas-producing foods for the time being.
- Take it easy and give your body rest until your digestion has recovered.
Blood in the stool, high fever, severe abdominal pain or clear signs of dehydration — in children and elderly people especially quickly — should be seen by the doctor on the same day. If diarrhoea lasts longer than a few days, the family doctor's practice should be visited. Medical evaluation is also advisable after long-distance travel or in the case of recurring symptoms.

Frequently asked questions
- What should I drink when I have diarrhea?
- For mild diarrhoea, water, unsweetened tea and clear broth, which also provides some salt, are usually sufficient. For more pronounced fluid losses, oral rehydration solutions (ORS) from the pharmacy are preferable — especially for children, older people and other persons with an increased risk of dehydration. It is important to drink regularly throughout the day.
- When is diarrhea harmless?
- Brief diarrhea as part of an infection that subsides after a few days is usually harmless. If it persists longer, medical advice is advisable.
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