Mental Health

Postpartum psychosis

Postpartum psychosis is a rapidly evolving severe mental illness, usually beginning in the first 2 weeks after birth, with psychotic and affective symptoms that require immediate specialist assessment, urgent risk management and usually inpatient treatment.

In a nutshell

Postpartum psychosis is a rapidly evolving severe mental illness, usually beginning in the first 2 weeks after birth, with psychosis plus mania, depression or a mixed state. It is a psychiatric emergency: refer to secondary mental health care, preferably specialist perinatal services, for assessment within 4 hours; most women need admission, ideally to a Mother and Baby Unit. Protect mother and infant, investigate medical causes, start specialist treatment, make informed feeding and medication decisions, and plan relapse prevention before future pregnancies.

Classic presentation

Within days of birth, a woman develops almost no sleep, racing thoughts, rapidly changing mood, perplexity and delusions or hallucinations. Treat as an emergency even without previous mental illness; arrange same-day specialist assessment and safe admission, ideally with the infant in an MBU.

Key points

Usually begins in the first 2 weeks postpartum and can worsen rapidly; it may be the first presentation of severe mental illness.
Bipolar I disorder, previous postpartum psychosis and a first-degree family history of severe perinatal mental illness are major risk factors, but no psychiatric history does not exclude it.
NICE requires immediate specialist assessment within 4 hours of referral for sudden-onset suspected postpartum psychosis.
Most women need hospital treatment; NICE normally recommends a specialist Mother and Baby Unit within 12 months of childbirth unless specific reasons make this unsuitable.
Assess suicide, infant, safeguarding, domestic-abuse, self-neglect and accidental-harm risk, alongside sepsis, hypertensive/eclamptic, neurological, endocrine, medication and substance causes.
Treat with specialist antipsychotic-based care, considering a mood stabiliser, short-term benzodiazepine or ECT according to severity and perinatal context; use current BNF and breastfeeding advice.
Valproate is generally not an option for a mental-health problem in women of childbearing potential without strict exception and a pregnancy prevention programme; lithium and breastfeeding need specialist discussion because infant exposure can be high.

First-line investigation

Immediate psychiatric, safeguarding, collateral and physical assessment with targeted investigations for delirium, sepsis, hypertensive/eclamptic disease, endocrine, neurological, medication and substance causes.

Management

Escalate within 4 hours and protect mother and infant

Sudden hallucinations, delusions, mania, severe confusion or marked sleep loss after childbirth require immediate secondary mental-health referral, preferably to specialist perinatal services; NICE specifies assessment within 4 hours of referral.^1,3
Assess suicide, infant-harm, self-neglect, agitation, safeguarding, domestic-abuse and supervision risk; investigate physical red flags in parallel and use emergency pathways when danger is immediate.^1,4

Admit to the safest specialist setting

Most women need inpatient treatment; NICE normally recommends a Mother and Baby Unit for mental-health admission within 12 months after childbirth unless specific reasons make this unsuitable.^1,7
Ensure the infant has safe supervision and a documented feeding, contact, family and safeguarding plan; use the least restrictive legal pathway compatible with safety and capacity.^1,3

Treat rapidly with perinatal specialist input

Start specialist antipsychotic-based treatment and consider a mood stabiliser or ECT according to clinical state, severity, speed required and previous response; consider short-term benzodiazepine only for severe anxiety or agitation when appropriate.^1,5,2,6
Discuss breastfeeding, medicine transfer, infant monitoring and the risks of stopping effective medication. Avoid valproate for mental-health treatment in women of childbearing potential except under strict NICE/MHRA conditions; lithium and breastfeeding require specialist advice.^1,6

Prevent relapse and restore the relationship

Review sleep, mood, psychosis, medication, capacity, risk, infant care, physical health, support and the mother-infant relationship through admission and discharge; coordinate parent-infant, social-care, health-visiting and family support.^1,3
Before a future pregnancy, arrange specialist perinatal preconception counselling, a written relapse and emergency plan, early postnatal monitoring and an individual medication and feeding plan.^1,2,9

Exam traps

Postpartum psychosis is not baby blues: hallucinations, delusions, mania, marked confusion or inability to sleep require emergency assessment.
Do not wait for a routine appointment or manage it solely in primary care; NICE specifies specialist assessment within 4 hours of referral.
A woman with bipolar disorder is high risk, but postpartum psychosis can be a first psychiatric episode.
Delusions involving the infant, suicidal intent, command experiences, severe agitation or inability to care safely require urgent risk and safeguarding action.
Confusion after childbirth is not automatically psychiatric; assess sepsis, hypertensive or eclamptic disease, thyroid/metabolic disease, neurological disease, medication effects and substances.
An MBU is normally preferred for inpatient care within 12 months of childbirth, but the safest available setting takes priority if an MBU is unsuitable.
Do not give simplistic breastfeeding or drug advice: discuss antipsychotics, lithium, valproate, infant monitoring and feeding choices with perinatal specialists and current BNF/UKDILAS resources.

Key sources

This page is exam revision material, not medical advice, and must not be used for patient care. Always check drug doses against the BNF and current guidance. Full disclaimer.