Home > Patients & Visitors > Health Library > Cottonmouth (Water Moccasin)
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
6 ft (2 m) long and
Symptoms of a cottonmouth bite usually appear from minutes to
hours after a bite and can include:
If you think you have been bitten by a water moccasin,
call 911 or other emergency services immediately.
ByHealthwise StaffPrimary Medical ReviewerWilliam H. Blahd, Jr., MD, FACEP - Emergency MedicineAdam Husney, MD - Family MedicineSpecialist Medical ReviewerSean P. Bush, MD, FACEP - Emergency Medicine, Envenomation Specialist
Current as ofJune 12, 2016
Current as of:
June 12, 2016
William H. Blahd, Jr., MD, FACEP - Emergency Medicine & Adam Husney, MD - Family Medicine & Sean P. Bush, MD, FACEP - Emergency Medicine, Envenomation Specialist
To learn more about Healthwise, visit Healthwise.org.
© 1995-2016 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
Our interactive Decision Points guide you through making key health decisions by combining medical information with your personal information.
You'll find Decision Points to help you answer questions about:
Get started learning more about your health!
Our Interactive Tools can help you make smart decisions for a healthier life. You'll find personal calculators and tools for health and fitness, lifestyle checkups and pregnancy.
Feeling under the weather?
Use our interactive symptom checker to evaluate your symptoms and determine appropriate action or treatment.