What should you know about the pathophysiology of postnatal depression?

After birth, rapid hormonal and physical changes occur while sleep is often fragmented and daily routines change. Recovery from birth, feeding difficulties, pain, isolation, relationship stress, financial pressure or a previous mental-health condition can add strain. These factors may affect mood regulation, energy, concentration and the ability to feel pleasure; no single cause explains every case.

Symptoms can include low mood, hopelessness, guilt, anxiety, irritability, loss of interest, difficulty bonding, appetite or sleep changes and thoughts of death. Low mood after birth is a key symptom, while low sex drive may occur as part of the wider picture. Postnatal depression can affect any parent and is not a failure of love or character.

Tell a GP, midwife, obstetric clinician or mental-health professional what has changed and how long it has lasted. Mention sleep, feeding, pain, intrusive thoughts, medicines and previous episodes. Care may include talking therapy, practical and social support, treatment for physical contributors and prescribed medicine when suitable. Perinatal mental health support can be tailored to the parent and family.

Seek prompt assessment when symptoms persist, worsen, or interfere with eating, sleeping, self-care, bonding or infant care. Get emergency help for suicidal thoughts, thoughts of harming the baby, severe confusion, hallucinations, extreme agitation or loss of contact with reality. Keep the person and baby with a trusted adult while urgent help is arranged.

Could this be postnatal depression, anxiety or another condition? Are pain, thyroid problems, anaemia or medicines contributing? Which therapy or medicine fits feeding plans, and how will safety and progress be monitored?