Is traveller's diarrhoea safe in travellers?

Traveller's diarrhoea commonly causes loose or watery stools, urgency, stomach cramps, nausea and sometimes vomiting. It can follow contaminated food or water and may settle as the body clears the infection. The main immediate concern is losing fluid and salts, especially in hot weather or when vomiting prevents drinking.

Risk is greater for young children, older adults, pregnant people and anyone with a long-term illness or reduced immunity. Diarrhoea can also affect the timing or absorption of regular medicines, so do not assume every tablet will work normally during severe vomiting or frequent stools.

Take frequent small sips of safe water and use an oral rehydration solution when available. Continue light foods as tolerated, such as rice, bread, bananas or soup. Wash hands carefully and avoid preparing food for others while unwell. Rest, and ask a pharmacist or clinician before using anti-diarrhoeal medicine if you have fever, blood in the stool, severe pain or significant illness.

Keep track of whether you can drink, pass urine and move around normally. Avoid alcohol while symptoms are active. If you take medicines for diabetes, blood pressure or another condition, ask a healthcare professional how illness and reduced eating may affect them.

Get medical help promptly for very little or dark urine, dizziness when standing, confusion, marked weakness, repeated vomiting, severe abdominal pain, blood or black stool, or a high temperature. Seek advice if diarrhoea is not improving, returns after settling, or occurs in a person who is pregnant, very young, older or immunocompromised.

How can I recognise dehydration? Which rehydration products are suitable where I am travelling? Should I change any regular medicine during vomiting or poor intake? What symptoms mean I need a local clinic rather than self-care?