Food poisoning without fever: what to know

Food poisoning is a foodborne illness, and fever is only one possible symptom. Some people mainly notice loose stools, stomach cramps, nausea or vomiting. The absence of fever does not confirm the cause, because similar symptoms can come from other infections, medication effects or digestive conditions. The timing after a meal, how symptoms progress, and whether anyone else became ill can help a clinician assess the pattern.

Prioritise fluids with regular small sips. An oral rehydration drink can replace water and salts lost through diarrhoea; avoid alcohol and go gently with rich foods until your stomach settles. Eat small portions when appetite returns. Wash hands with soap and water and clean shared bathroom surfaces. Avoid taking antibiotics or anti-diarrhoeal medicine unless a clinician advises it for your situation.

Get medical advice if you cannot drink enough, are passing very little urine, feel dizzy on standing, have blood or black stool, severe abdominal pain, repeated vomiting, or diarrhoea that continues or worsens. Fever is not required for urgent assessment. Seek emergency help for fainting, confusion, severe weakness, or trouble breathing. Children, older adults, pregnant people, and anyone with a significant medical condition may need earlier advice.

Ask whether the symptoms fit food poisoning, whether a stool test is needed, and which medicines are safe. Share the start time, suspected foods, stool appearance, fluid intake, urine changes, and any medical conditions or regular medicines.