Postpartum Psychosis with Risk to the Infant

This is a psychiatric emergency until proved otherwise. Postpartum psychosis carries a high risk of suicide and infanticide, and the fact that she is not openly threatening does not make it safe. The judgement is based on the combination of acute onset, insomnia, bizarre beliefs about the baby, suspiciousness and rough handling of the infant.

I would assess risk by asking directly about thoughts of harming herself or the baby, whether she has heard voices telling her to do something, whether she believes the baby is in danger, and whether she has any plan or access to means. I would ask the husband and other relatives for collateral because she may conceal symptoms. I would examine her for medical causes: fever, infection, blood pressure, thyroid swelling, dehydration and medication or drug use. The baby needs urgent assessment for weight loss and jaundice.

Immediately:

• do not leave her alone with the baby;
• arrange admission, ideally to a mother-and-baby unit; if none is available, transfer to the nearest psychiatric facility with the baby cared for safely by a relative;
• explain to the husband that this is not 'just stress' and that taking her home would be unsafe;
• involve a senior clinician and follow local mental health legislation.

She needs calm, respectful containment, not confrontation.

The most likely diagnosis is postpartum psychosis, often an affective psychosis or the first episode of bipolar disorder. The rapid onset in the first two weeks after delivery, insomnia, irritability, grandiose or bizarre beliefs and suspiciousness fit this picture.

The differential includes:

• Delirium from sepsis: endometritis, mastitis or urinary infection; the pulse of 102/min and temperature of 37.8°C are not dramatic but do not exclude infection.
• Thyroid storm or postpartum thyroiditis: can cause agitation, insomnia and tachycardia.
• Eclampsia or cerebral venous thrombosis: possible after delivery, though blood pressure is normal; headache or focal signs should prompt urgent imaging.
• Drug-induced psychosis: ask about steroids, anticholinergics or stimulants.
• Severe postpartum depression with psychotic features: less acute but possible.

Investigations: full blood count, CRP, electrolytes, renal and liver function, thyroid function, urine culture, blood culture if febrile, pregnancy test if uncertain, and drug screen if available. A mental state examination and collateral history are as important as the laboratory tests. The judgement is not to label her as 'psychiatric' before excluding a physical cause, and not to delay psychiatric safety measures while waiting for results.

I would tell the husband clearly that his wife is seriously unwell and that home care is not safe at this moment. I would avoid blaming him or dismissing his concern. The explanation should be concrete: she is not sleeping, she believes the baby is possessed, and she has handled the baby roughly; these are signs of an illness that needs hospital treatment, not a character flaw.

Treatment:

• antipsychotic medication is usually needed; the choice depends on local availability and breastfeeding plans;
• if she is breastfeeding, some antipsychotics such as haloperidol or olanzapine are preferred over others, but the decision must weigh the risks of untreated psychosis, which are greater;
• avoid abrupt use of mood stabilisers such as sodium valproate in a woman who may breastfeed; involve a specialist;
• electroconvulsive therapy may be considered if she is severely ill or refuses food and fluids.

The baby's feeding and jaundice need urgent review; if she cannot breastfeed safely, express and support or use formula safely. I would arrange admission or transfer, explain the legal basis if she lacks capacity, and give the husband written contact details. Follow-up must include relapse prevention and contraception planning, because the risk of recurrence in a future postpartum period is high.