What is Diarrhoea?

Diarrhoea means passing soft or watery stools more often than is normal for the person. Everyone’s normal bowel pattern is different, so the customer’s usual pattern is the starting point.  

Diarrhoea is a symptom, not a disease. 


What usually happens?

Most diarrhoea is caused by an infection in the gut and usually starts quickly. Vomiting may happen before or at the same time and often settles before the diarrhoea does.  

Most cases improve within 2 to 4 days without treatment. 

Vomiting can occur with diarrhoea 

Vomiting often occurs alongside diarrhoea. It may start before or at the same time as the diarrhoea and usually settles first.

Vomiting can make it difficult for the customer to keep fluids down. Because replacing lost fluids is the most important part of managing diarrhoea, severe vomiting or being unable to keep fluids down needs pharmacist assessment. 


Who is most at risk?  

Diarrhoea can affect anyone, but dehydration is more likely to become serious in:  

  • babies  

  • young children  

  • older people  

Children under 5 experience diarrhoea particularly often. 

The main risk is dehydration 

The main danger from diarrhoea is not the diarrhoea itself. It is dehydration.  

Replacing lost fluid and salts comes before every other product on the shelf. 


Your role in community pharmacy 

Your role is to:  

  • listen carefully  

  • ask the right questions

  • check for dehydration 

  • recognise warning signs  

  • understand the available treatment options  

  • know when the pharmacist must take over  

You do not tell the customer what is causing their diarrhoea.  

Before you continue

Most diarrhoea settles quickly, but some symptoms need closer assessment.  

The next lesson will help you recognise typical symptoms, signs of dehydration and the features that need pharmacist involvement.