Can I breastfeed with food poisoning?

The verdict

Keep feeding. The organisms responsible for most food poisoning and gastroenteritis, including norovirus, campylobacter and salmonella, cause illness in your gut. They are not excreted into breast milk, and stopping feeds does not protect your baby from them.

What does spread them is hands and surfaces. The NHS describes norovirus as spreading very easily through close contact, touching surfaces the virus is on, and food handled by someone with the virus. That is precisely the route a parent uses dozens of times a day, and it is the route worth attacking.

Why the milk is not the problem

Food poisoning is, with a small number of exceptions, a localised gut infection. The pathogen multiplies in the intestine and is shed in stool. It does not enter the bloodstream in most cases, and it therefore has no route into milk.

La Leche League GB groups stomach bugs with colds and flu and gives the same answer: continuing to breastfeed gives your baby valuable protection against the effects of your illness, and there is no need to separate because he will already have been exposed before you realised you were ill.

The protection runs the other way too. If your baby does catch a gastrointestinal bug, breast milk is the one feed that stays tolerable. It is easily digested, it is fluid replacement, and it carries antibodies. Advice to stop milk feeds during a baby's own vomiting illness does not apply to breastfeeding, and feeding more often in smaller amounts is usually the right adjustment.

Dehydration is the real risk, and it is yours

The thing that will make you feel catastrophic is not the infection. It is fluid loss on top of the fluid demand that milk production already places on you. Vomiting and diarrhoea can strip litres, and you are still producing milk while it happens.

La Leche League GB advises keeping up your fluid intake to prevent dehydration even if you cannot eat. Small, frequent sips work better than large drinks when you are nauseated. Oral rehydration salts from a pharmacy are designed for exactly this and are worth using rather than plain water alone if losses are heavy.

The NHS advice for diarrhoea and vomiting is to drink plenty of fluids to avoid dehydration, and to get medical advice if you cannot keep fluids down, if there is blood in your vomit or stool, or if symptoms do not start improving after a few days. Signs of dehydration in an adult include dark strong-smelling urine, passing urine less often, feeling dizzy or lightheaded, and a dry mouth.

Does supply drop?

It can dip briefly if you become dehydrated, and it recovers. La Leche League GB notes that you will continue to make milk even when you feel very ill, and that continuing to feed whenever your baby is interested maintains production and rebuilds it afterwards. A short-lived dip during a vomiting bug is not a supply problem, it is a fluid problem, and it responds to fluids.

Hand hygiene is the intervention

This is where the effort belongs. Wash hands with soap and water after every visit to the toilet and before every feed, before preparing any food and before touching bottles, dummies or pump parts. Alcohol gel is less effective against norovirus than soap and water, so use the tap.

Do not share towels, and change hand towels frequently. Clean toilet flush handles, taps and door handles. The NHS advises staying off work or school until you have not vomited or had diarrhoea for two days, which is a useful marker for when you are no longer a meaningful source of spread within the household too.

If someone else can take the baby between feeds while you are actively vomiting, take the offer. That is not weaning, it is reducing hand-to-baby contact during the highest-shedding period.

Anti-sickness and anti-diarrhoea medicines

This site publishes no doses and no medicine recommendations. Some anti-sickness medicines are routinely used by breastfeeding parents and some are not, and the same is true for anti-diarrhoeal products. Ask a pharmacist about the specific product, or use the Breastfeeding Network's Drugs in Breastmilk service in the UK or LactMed internationally. Do not assume that something available without prescription is automatically the right choice while feeding.

When it is more than a bug

Get medical advice for blood in your stool or vomit, a very high temperature, severe abdominal pain, symptoms that are worsening rather than settling after a few days, or an inability to keep any fluids down. The NHS also advises seeking advice if you have recently travelled abroad, or if you have a condition or treatment that weakens your immune system.

Listeria and a small number of other infections behave differently from ordinary food poisoning because they can become invasive, and those are treated as medical problems in their own right rather than as something to sit out. If you are unwell enough to be considering hospital, go, and tell them you are breastfeeding so that feeding can be supported rather than interrupted by default.

Where guidance differs

There is no international disagreement here.

The UK, through the NHS and La Leche League GB, treats gastrointestinal illness as compatible with continued breastfeeding and points at hand hygiene as the control measure.

Ireland, through the HSE, gives the same food poisoning advice on fluids and hygiene, and the same breastfeeding position.

The US, through the American Academy of Pediatrics, states that few infections prevent breastfeeding and that expressing preserves supply if illness ever does interrupt direct feeding.

The only genuine caveat everyone shares is that severe or invasive infection is a clinical problem needing treatment, and that treatment decisions should be made knowing you are breastfeeding.