Stroke warning signs: what to do when symptoms appear, what a mini-stroke is, and which specialty treats stroke

What are the warning signs of stroke?

Cerebrovascular disease usually comes on suddenly, and possible symptoms include paralysis or numbness of the body and limbs, slurred speech, blurred vision, incontinence, sudden severe headache, unsteadiness on standing or unexplained falls, with severe cases leading to coma or death (Centre for Health Protection, March 2026); the symptoms listed in other Department of Health information are in the table below. Stroke patients usually have no symptoms beforehand, and symptoms appear suddenly when the stroke occurs (Centre for Health Protection, July 2026).

Stroke symptoms depend on the location and extent of the brain damage, and each patient's symptoms can differ (Department of Health Elderly Health Service); whether it is a stroke is diagnosed by a doctor, and individual cases are decided by the treating doctor.

What should you do if stroke symptoms appear?

Suspected stroke is an emergency: call 999 or go to an Accident and Emergency Department immediately; do not arrange your own transport or wait and see (this site’s note).

Patients with symptoms of cerebrovascular disease should be taken to hospital as soon as possible, because delayed treatment can affect the course of the condition and reduce the chance of recovery (Centre for Health Protection, March 2026); these are sudden, acute symptoms, and delay in diagnosis and treatment can have serious consequences (Centre for Health Protection, July 2026).

Time is critical in treating stroke: the earlier the patient notices stroke symptoms and receives appropriate treatment, the better the outcome; if you think you or someone near you may be having a stroke, stop what you are doing immediately and seek emergency medical help (Centre for Health Protection, October 2013).

For how the Accident and Emergency Department triages patients by condition and what it charges, see Accident and Emergency fees and triage.

What is a mini-stroke?

A transient ischaemic attack (TIA, also called a ‘mini-stroke’) is a temporary blockage of the blood supply to the brain caused by a blood clot, with symptoms such as numbness of the face or limbs, slurred speech or blurred vision, usually lasting less than 24 hours (Centre for Health Protection, October 2013).

A mini-stroke generally does not cause permanent damage to the brain, but it increases the chance of a later stroke; the warning signs listed in Non-Communicable Diseases Watch apply to both stroke and mini-stroke, and if you think these symptoms may be occurring, seek emergency medical help immediately (Centre for Health Protection, October 2013).

What are the risk factors for stroke? How can it be prevented?

Risk factors for cerebrovascular disease include old age, high blood pressure, high blood lipids, diabetes, smoking, excessive drinking, obesity and lack of physical activity; underlying conditions such as rheumatic heart disease or congenital cerebrovascular abnormalities also increase the chance of the disease (Centre for Health Protection, March 2026).

Quitting smoking, avoiding alcohol, a balanced diet, regular physical activity, and keeping a healthy weight and waist circumference are all important, and controlling high blood pressure and diabetes can effectively reduce the risk of cerebrovascular disease (Centre for Health Protection, March 2026). Ways to prevent stroke also include regular health check-ups, and controlling blood pressure with a blood pressure check at least once every two years (Centre for Health Protection, July 2026).

Arrhythmia increases the chance of stroke five times (Department of Health Drug Office, October 2014); see Arrhythmia symptoms.

There were 2,911 registered deaths from cerebrovascular disease in 2024, ranking fourth among the most common fatal diseases in Hong Kong (Centre for Health Protection, March 2026).

How is stroke treated? Can patients recover?

Treatments for stroke include medicines, surgery, lifestyle changes, and rehabilitation provided by nurses, physiotherapists, speech therapists, occupational therapists and others; which treatment is used depends on how severe the condition is, how the stroke affects daily life, and whether there are other illnesses (Centre for Health Protection, July 2026).

Stroke can cause paralysis of one side of the body, but with appropriate treatment many patients can regain some function; the aims of care include improving quality of life, increasing the ability to look after oneself, and preventing complications such as pressure sores, lung infections, choking and frozen shoulder (Department of Health Elderly Health Service).

Treatment and rehabilitation arrangements for an individual patient are decided by the treating doctor.

Which specialty treats stroke?

When a stroke occurs, the patient should be taken to hospital as soon as possible (Centre for Health Protection, March 2026). Emergency Medicine specialises in acute illnesses that threaten life, Neurology deals with diseases of the brain, spinal cord, peripheral nerves and muscles, and Neurosurgery diagnoses and treats conditions of the brain, spinal cord and peripheral nerves through surgery, including minimally invasive and endoscopic surgery (Hong Kong Academy of Medicine, Specialty Descriptions, April 2025).

Which specialty follows up an individual patient is decided by the treating doctor according to the condition; for the difference between Neurology and Neurosurgery, see How to choose a neurologist, and for the English name, see Stroke in English.

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