Overview
Not every emergency involves obvious trauma. Many are medical emergencies — sudden illnesses that can threaten life and require quick recognition. This lesson describes the warning signs of six common emergencies: heart attack, stroke, seizure, diabetic emergency, anaphylaxis, and respiratory distress. The emphasis is on recognition and knowing when to call for help, because early action often determines the outcome.
Important: This is educational content and not a substitute for certified hands-on training. It does not qualify you to diagnose or treat. In any suspected medical emergency, call your local emergency number immediately.
Heart Attack
A heart attack occurs when blood flow to part of the heart muscle is blocked. Warning signs include:
- Chest pain or pressure, often described as squeezing or heaviness
- Discomfort spreading to the arm, jaw, neck, or back
- Shortness of breath, sweating, nausea, or lightheadedness
Symptoms can be subtler in women, older adults, and people with diabetes. Have the person rest, call for help immediately, and be prepared to start CPR if they become unresponsive and stop breathing normally.
Stroke: Think FAST
A stroke is a sudden loss of blood flow to part of the brain. Fast recognition saves brain tissue. Use FAST:
| Letter | Check |
|---|---|
| F | Face — ask the person to smile; does one side droop? |
| A | Arm — ask them to raise both arms; does one drift down? |
| S | Speech — is speech slurred or strange? |
| T | Time — if any sign is present, note the time and call for help immediately |
Noting when symptoms began is critical, because time-sensitive treatments depend on it.
Seizures
A seizure is a burst of abnormal electrical activity in the brain. A convulsive seizure may cause stiffening, jerking, and loss of awareness. During a seizure, the goal is to protect the person from harm:
- Move away hazards and cushion the head.
- Do not restrain the person or put anything in their mouth.
- Time the seizure.
- When it ends, roll them onto their side (recovery position) and stay with them through the confused postictal state.
Call for help if the seizure lasts more than about 5 minutes, repeats, follows an injury, or occurs in someone with no history of seizures or who does not recover normally.
Diabetic Emergencies
People with diabetes can develop dangerous blood sugar levels. Hypoglycemia (low blood sugar) tends to come on quickly with confusion, sweating, shakiness, and weakness, and can progress to unresponsiveness. If the person is awake and able to swallow, giving a source of sugar (such as juice or glucose tablets) often helps rapidly. High blood sugar develops more slowly, causing thirst, frequent urination, and fruity-smelling breath. When in doubt and the person can swallow, giving sugar for suspected low blood sugar is the safer choice; if they are unresponsive, do not give anything by mouth and call for help.
Anaphylaxis
Anaphylaxis is a severe, rapid allergic reaction, often to foods, insect stings, or medications. Signs include:
- Widespread hives, flushing, or itching
- Swelling of the lips, tongue, or throat
- Difficulty breathing or wheezing
- Dizziness or signs of shock
Anaphylaxis is a true emergency. Many people at risk carry an epinephrine auto-injector, which delivers a premeasured dose of epinephrine into the outer thigh; using it promptly can be lifesaving. Always call emergency services, because symptoms can return even after treatment.
Respiratory Distress
Respiratory distress is difficulty breathing from causes such as asthma, COPD, infection, or allergic reactions. Look for rapid or labored breathing, wheezing, an inability to speak full sentences, use of neck and shoulder muscles, and a bluish tinge to the lips (cyanosis). Help the person into a position of comfort, usually sitting upright, assist with their own prescribed inhaler if appropriate, and call for help if breathing is severe or worsening.
When to Call for Help
When in doubt, call. Summon emergency services immediately for chest pain, any FAST stroke sign, difficulty breathing, a first-time or prolonged seizure, unresponsiveness, or signs of anaphylaxis or shock. Early recognition and a prompt call are the most valuable actions a bystander can take.
Clinical Relevance
Many of the most treatable emergencies are also the most time-sensitive. Clot-dissolving and clot-removing treatments for stroke, artery-opening procedures for heart attack, and epinephrine for anaphylaxis all work best when started early — which depends entirely on someone recognizing the problem and calling for help. A bystander does not need to diagnose the exact condition; noticing that something is seriously wrong, using simple tools like FAST, and activating EMS quickly connects the patient to the definitive care that can save a life or preserve brain and heart function.