Food poisoning stages: what to expect

At onset, nausea, cramping, vomiting, diarrhoea, or fever may appear. During the active phase, repeated vomiting or diarrhoea can make it difficult to replace fluids and salts. As the illness settles, appetite and energy usually return gradually, although the stomach may remain sensitive for a while. Not everyone experiences each phase, and symptoms can begin at different intervals depending on the foodborne cause. A new or worsening symptom deserves fresh assessment.

During active symptoms, rest and take small sips of water or Oral Rehydration Therapy. Once vomiting eases, try light, familiar foods in small portions and increase them as tolerated. Wash hands carefully and avoid preparing food for others while you have diarrhoea or vomiting. Keep a simple record of fluids, urine, symptoms, and any food shared with others. Do not use leftover antibiotics or medication prescribed for someone else.

Seek urgent help for confusion, fainting, trouble breathing, severe weakness, inability to keep fluids down, or very little urine. Prompt medical review is also needed for blood in vomit or stool, severe abdominal pain, or a high fever with a worsening condition. If symptoms are not settling or return after improvement, contact a clinician. Children, older adults, pregnant people, and people with chronic illness can become dehydrated more quickly.

Which stage does my symptom pattern suggest? How can I replace fluids safely? Do I need tests or treatment? When can I return to normal meals and activities?