Early Stroke Symptoms
When to Rush to the Hospital
Recognising sudden warning signs and activating emergency care immediately can protect life and brain function.
Medically reviewed educational content | Updated: 26 June 2026 | Reading time: about 8 minutes
A sudden new B.E. F.A.S.T. sign is enough to call Thailand EMS 1669.
1. B.E. F.A.S.T.: warning signs that need immediate action
Key point: B.E. F.A.S.T. is a screening reminder—not a diagnosis. A sudden new sign in any category is enough to call Thailand EMS 1669.
B — Balance loss
Sudden severe imbalance, loss of coordination or inability to walk normally. Dizziness alone is common and is not specific, but dizziness together with imbalance, double vision, weakness or speech change is concerning.
E — Eye or vision change
Sudden loss of vision, a missing part of the visual field, blurred vision or double vision in one or both eyes.
F — Face drooping or numbness
One side of the face suddenly droops or feels numb; the smile may become uneven.
A — Arm weakness or numbness
One arm suddenly becomes weak, numb, difficult to lift or drifts downward. Leg weakness may also occur.
S — Speech difficulty
Speech becomes slurred, confused or difficult to understand, or the person cannot find words or understand a simple sentence.
T — Time to call 1669
Call immediately, note the time the person was last known well, and do not wait to see whether the symptoms improve.
Not every stroke produces all six signs. Posterior-circulation or brainstem strokes may present with severe imbalance, double vision, speech difficulty, reduced consciousness or several symptoms occurring together.
2. Other sudden symptoms and transient attacks
Key point: Sudden neurological symptoms need emergency assessment even when they do not fit B.E. F.A.S.T. perfectly or disappear within minutes.
Sudden severe headache
A sudden severe headache with no known cause—especially with vomiting, reduced alertness, neck stiffness, seizure or neurological change—can signal bleeding or another emergency.
Sudden confusion or inability to understand
New disorientation, inappropriate responses or inability to follow a simple instruction may occur with stroke but can also have other urgent causes.
Sudden swallowing difficulty
New choking, a wet voice, inability to manage saliva or difficulty swallowing may accompany a brainstem or other stroke. Do not test swallowing with food or water.
Sudden leg weakness or numbness
A leg may suddenly buckle, drag or feel numb, with or without arm or facial symptoms.
Symptoms that disappear may be a TIA
A transient ischaemic attack can stop before help arrives, but it still needs emergency assessment. Published AHA guidance reports a 90-day stroke risk of up to about 18%, with almost half of subsequent strokes occurring within two days. Do not cancel the ambulance because the person looks better.
Symptoms that improve or do not fit every classic sign still need urgent assessment.
3. Why every minute matters—and what the treatment windows mean
Key point: Emergency teams treat as soon as possible. The clock does not determine treatment by itself; eligibility depends on stroke type, disability, imaging, bleeding risk, vessel location and other clinical factors.
| Treatment | Current practical message |
|---|---|
| IV thrombolysis | For eligible disabling ischaemic stroke, treatment is given as soon as possible within 4.5 hours. Selected people with unknown onset or 4.5–9 hours may be treated using advanced imaging criteria. |
| Mechanical thrombectomy | For selected vessel occlusions, clot removal is performed as soon as possible and may be offered up to 24 hours after onset or last known well, depending on clinical and imaging eligibility. |
The often-quoted estimate of about 1.9 million neurons lost per minute came from a model of a typical untreated large-vessel ischaemic stroke while ischaemia continued. It is not a measurement for every patient or every stroke type. Its useful message is simple: activate emergency care without delay.
Do not decide at home that it is “too late.” Even when the person is outside a familiar time window, the hospital must assess for haemorrhage, complications, secondary prevention and any treatment still available.
Treatment eligibility depends on stroke type, time, imaging and clinical factors.
4. What to do while waiting for emergency services
Key point: Call 1669, record the last-known-well time, keep the person safe, follow dispatcher instructions and avoid anything that delays hospital assessment.
Call Thailand EMS 1669 — Say that you suspect stroke, describe the signs, location and onset time, and follow the dispatcher’s instructions.
Record time information — Note when the person was last known normal and when symptoms were first noticed. If they woke with symptoms, record when they were last seen well before sleep.
Keep the airway and breathing safe — Keep the person in a comfortable, supported position. If unconscious but breathing or vomiting, position them on their side when safe and follow EMS instructions. Do not impose one head angle on every patient.
Give nothing by mouth — Do not give food, water, herbal products or tablets because swallowing may be unsafe and urgent procedures may be needed.
Do not give aspirin on your own — Brain imaging is needed to distinguish blocked-vessel stroke from bleeding. Aspirin can worsen haemorrhage and may interfere with acute treatment.
Monitor and prepare information — Watch breathing and responsiveness. If the person stops breathing normally, follow dispatcher CPR instructions. Prepare medicine lists, allergies and identification without delaying transport.
5. After acute treatment: when rehabilitation begins
Key point: Rehabilitation is the next stage after emergency diagnosis and stabilisation. It should begin as early as the person is medically stable and able to participate safely—not according to a fixed 24–72-hour rule.
Early assessment may cover positioning, movement, swallowing, communication, cognition, self-care, pressure risk and discharge needs. Very early high-intensity or prolonged mobilisation during the first 24 hours is not appropriate for everyone.
Needs-based multidisciplinary care
Physical therapy, occupational therapy, speech-language therapy, nursing, medical care, psychology and nutrition may contribute according to identified needs.
Meaningful goals and suitable dose
Therapy intensity should match the person’s tolerance and goals. Guidance describing three hours refers to combined multidisciplinary rehabilitation for people who can participate—not three hours of physical therapy for everyone.
Adjunct technology is not emergency treatment
TMS is an evolving adjunct for selected impairments; HBOT is not established routine stroke-recovery treatment; aquatic therapy needs safety screening; and Cerebrolysin has mixed evidence. None replaces acute stroke care or standard rehabilitation.
Choose the most appropriate setting
Depending on medical and nursing needs, rehabilitation may be inpatient, residential, outpatient, day-based or home-based. The first months are important, but recovery can continue beyond six months and one year.
Related information: stroke rehabilitation programme, physical therapy, home physical therapy, home nursing and patient stories. Current staffing, availability, prices and inclusions should be confirmed directly after the hospital team has determined the person is ready for transfer.
Rehabilitation follows emergency treatment and medical stabilisation.
6. A simple family emergency plan
Keep this message visible: Sudden balance or vision change, facial droop, arm weakness or speech difficulty = call 1669, note last known well, give nothing by mouth and do not wait for improvement.
Post-hospital rehabilitation enquiries
For a suspected acute stroke, call 1669 first. This contact section is not an emergency triage service.
