Postnatal psychosis Introduction [Original article on NHS Choices website] Postpartum psychosis is a severe mental illness that can affect a woman after she has a baby. It causes her to have hallucinations and delusional thinking (symptoms of psychosis). Postpartum psychosis is thought to affect around one in every 1,000 women who give birth. It’s sometimes referred to as puerperal … Continue reading Postnatal Psychosis