“Sectioned” most commonly refers to being legally detained in a hospital for mental health treatment against your will. The term comes from the UK’s Mental Health Act 1983, where different “sections” of the law authorize different types of detention. When someone says a person has been sectioned, they mean that person has been compulsorily admitted to a psychiatric hospital because professionals determined they posed a serious risk to themselves or others.
Why It’s Called “Sectioning”
The Mental Health Act 1983 is divided into numbered sections, each granting specific powers. When professionals detain someone under one of these sections, the process becomes known as “being sectioned.” The most commonly used are Section 2 and Section 3, which cover assessment and longer-term treatment, respectively. Each section has its own rules about how long detention can last, who can authorize it, and what rights the patient retains.
Sectioning is considered a last resort. The law requires that all alternatives be fully considered before anyone is detained, including reviewing current medications, crisis support at home, respite care, and acute day facilities. Physical force and compulsory treatment are only permitted after negotiation and persuasion have been tried first.
How the Assessment Works
Before someone can be sectioned, a formal assessment takes place involving three professionals. The first is an approved mental health professional (AMHP), typically a social worker, nurse, occupational therapist, or psychologist who has been specifically trained and authorized to carry out duties under the Mental Health Act. The second is a registered medical practitioner, usually the person’s own GP. The third is a Section 12 approved doctor, typically a psychiatrist with specialist knowledge of the law.
The AMHP holds a surprising amount of power in this process. Even if both doctors agree that someone should be sectioned, the AMHP can override that recommendation. They make the final decision on whether compulsory detention is genuinely the best way to get the person appropriate treatment and support. The AMHP also coordinates the entire assessment and any subsequent hospital admission.
The Different Sections
Section 2 authorizes detention for assessment. A person held under Section 2 can be kept in hospital for up to 28 days while professionals evaluate their mental health and determine what treatment they need. This is often the first section applied when someone enters the system.
Section 3 authorizes detention for treatment and lasts up to six months. It can be renewed. This section is typically used when professionals already have a clear picture of the person’s condition and believe they need sustained inpatient care.
Police also have emergency powers. Under Section 135, a magistrate can issue a warrant allowing officers to enter someone’s home, by force if necessary, and take them to a place of safety. This applies when there’s reasonable cause to believe the person is being ill-treated, neglected, or is unable to care for themselves while living alone. Once removed, the person can be held for up to 24 hours while arrangements are made for a full assessment. Section 136 gives police similar powers to detain someone they encounter in a public place who appears to be experiencing a mental health crisis.
How Common Is Sectioning?
In England during 2024-25, NHS data recorded 52,731 new detentions under the Mental Health Act, and the true number is likely higher because not all providers submitted complete data. Among providers that reported consistently over eight years, detentions actually decreased by 4.9 percent compared to the previous year.
Men are sectioned at slightly higher rates than women: 90.1 per 100,000 population compared to 80.0 per 100,000. Age plays a bigger role. People aged 18 to 34 are detained at a rate of 132.2 per 100,000, roughly 69 percent higher than those aged 65 and over.
Rights During Detention
Being sectioned does not strip away all of a person’s rights. Patients can appeal their detention through a Mental Health Tribunal, an independent panel that reviews whether the legal criteria for continued detention are still met. Appeals are heard fresh, meaning the tribunal re-examines the case rather than simply checking whether the original decision followed procedure. Patients can also request a written statement of reasons for their detention, though this can take up to 21 days to arrive.
Family members and carers are typically involved in the process where the patient agrees to it. The law recognizes that deprivation of liberty is a serious matter, and the system is designed with checks at multiple stages to prevent misuse.
Other Meanings of “Sectioned”
Outside of mental health, “sectioned” has a straightforward meaning in science and medicine. In a laboratory, sectioning is the process of cutting tissue into extremely thin slices so they can be examined under a microscope. Tissue samples are first embedded in wax or a similar material to hold them rigid, then sliced with a precision instrument. This is routine in pathology, where doctors analyze biopsies to diagnose conditions like cancer.
The word can also simply mean divided into parts. A report might be “sectioned” into chapters, or an orange “sectioned” into segments. But when people search for this term, the mental health meaning is overwhelmingly what they’re looking for.