Sudden Medical Emergencies

Chronic Middle Ear Infection: Causes, Symptoms, and Treatment

A chronic middle ear infection develops when repeated ear infections damage the eardrum or lead to the formation of a cholesteatoma, a growth that encourages ongoing infection. Unlike acute ear infections, chronic infections tend to persist or repeatedly flare up over time. This condition is particularly concerning in children, as untreated infections can lead to […]

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Intussusception in Children: Symptoms, Causes, and Emergency Treatment

Intussusception occurs when one segment of the intestine slides into another, much like a telescope collapsing inward. This causes a bowel obstruction and can significantly reduce blood flow to the affected portion of the intestine. In Canada, intussusception is the most common cause of intestinal blockage in infants and young children between 3 months and

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Barotrauma: Ear Pain and Damage Caused by Air Pressure Changes

Barotrauma refers to pain or injury to the eardrum caused by sudden changes in air pressure. The eardrum separates the outer ear canal from the middle ear and is highly sensitive to pressure differences. Barotrauma commonly occurs during: Air travel (especially during takeoff and landing) Scuba diving Rapid elevation changes (mountain travel) In Canada, barotrauma

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Retinal Vein Occlusion (Eye Stroke): Causes, Symptoms, and Treatment

Retinal vein occlusion (RVO)—often referred to as an eye stroke—occurs when one of the veins responsible for draining blood from the retina becomes blocked. This blockage is usually caused by a blood clot or increased pressure within the retinal veins, impairing blood flow and damaging retinal tissue. Because the retina plays a critical role in

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Schistosomiasis: Causes, Symptoms, and Prevention

Schistosomiasis, also known as snail fever, is a serious parasitic disease that affects internal organs but is preventable. The condition develops when parasitic worms enter the body through skin contact with contaminated freshwater. Although schistosomiasis does not occur naturally in Canada, it remains highly relevant for Canadians who travel, work, volunteer, or provide humanitarian aid

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Hives (Urticaria): What Canadians Should Know for First Aid and Workplace Safety

Hives—medically known as urticaria—are raised, itchy welts that can appear suddenly on the skin. Many Canadians assume hives are always caused by food allergies or products like soap or detergent. While allergies can be a trigger, hives are often linked to other causes, including infections, stress, medications, and underlying health conditions. From a first aid

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Close look on an allergic reaction

Coughing Up Blood (Hemoptysis): First Aid Awareness and Emergency Response in Canada

Coughing up blood—medically known as hemoptysis—can be frightening to witness and alarming for the person experiencing it. Blood may appear mixed with mucus or phlegm and often looks frothy or bubbly, which usually indicates it is coming from the airways or lungs rather than the mouth or stomach. From a first aid, CPR, and workplace

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