What should you know about bad food poisoning symptoms?

Food poisoning happens when contaminated food or drink irritates the digestive system. Symptoms can include nausea, vomiting, loose stools, stomach cramps, and fever. The main concern during a severe episode is loss of water and salts, especially when vomiting prevents drinking. Blood in stool, intense abdominal pain, or illness in several people after the same meal can change how urgently advice is needed. Symptoms can overlap with other infections, so the pattern and timing matter.

Take frequent small sips of water or an oral rehydration solution. If vomiting occurs, pause briefly and restart with smaller amounts rather than drinking a large glass at once. When appetite returns, choose simple foods and avoid alcohol or foods that worsen symptoms. Wash hands carefully, clean bathroom surfaces, and avoid preparing food for others while unwell. Oral rehydration therapy may help replace fluid and salts; IV fluid therapy is used by clinicians when drinking is not enough.

Seek urgent help for confusion, fainting, severe weakness, very little urine, inability to keep fluids down, blood or black material in stool or vomit, severe or worsening abdominal pain, or difficulty breathing. Get prompt advice for a baby, older adult, pregnant person, or someone with a long-term illness or weakened immunity. Contact a clinician when diarrhoea or vomiting is persistent, fever is significant, or symptoms are not easing.

Ask whether you need testing, what fluid plan suits you, and which medicines to avoid. Tell the clinician what you ate, when symptoms started, how often you have vomited or passed stool, whether there is blood, and how much you have managed to drink and urinate.