The cottonmouth, also called a water moccasin, is a poisonous (venomous) snake found in southeastern and south central North America. They leave one, two, or three puncture marks on the skin, but you won't always see any marks.
Water moccasins can be up to 2 m (6 ft) long and have:
Distinctive white colouring inside the mouth.
Pit-like depressions behind the nostrils.
A triangular head with slit-shaped pupils and fangs.
A single row of plates or scales on the undersurface of the snake, including the tail.
Symptoms of a cottonmouth bite usually appear from minutes to hours after a bite and can include:
Severe, immediate pain with rapid swelling.
Discoloration of the skin.
Difficult or rapid breathing.
Changes in heart rate or rhythm.
Metallic, rubbery, or minty taste in the mouth.
Numbness or tingling around the mouth, tongue, scalp, feet, or the bite area.
Author: Healthwise Staff Medical Review: William H. Blahd Jr. MD, FACEP - Emergency Medicine Anne C. Poinier MD - Internal Medicine Adam Husney MD - Family Medicine Kathleen Romito MD - Family Medicine
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