![]() ![]() But a bite from a large nonpoisonous snake (such as a boa constrictor, a python, or an anaconda) can be more serious. Most nonpoisonous snakebites can be treated at home. Home treatment often relieves symptoms and helps prevent infection. A bite from a small nonpoisonous snake might leave teeth marks, a minor scrape, or a puncture wound without other symptoms. Bites may be scary, but most don't cause serious health problems. Most snakes and lizards in North America aren't poisonous. ![]() Even if you don't have symptoms within 8 hours, keep watching for symptoms for 2 weeks or more. And a dead snake, even one with a severed head, can still bite and release venom by reflex action for up to 90 minutes after it dies. A bite from a young snake can be serious. So a snake is still dangerous after the first strike. It's important to remember that a snake only injects part of its venom with each bite. If poison is released in the bite, about 35% of the bites have mild injections of poison (envenomations), 25% are moderate, and 10% to 15% are severe. At least 25%, and perhaps up to 50%, of bites are dry. If you don't have symptoms within 8 to 12 hours, it may be that no venom was injected. The age, size, and health of the person who was bitten.How many bites there were, and where they occurred on the body.The type and size of the snake or lizard.Several things affect how severe a poisonous snake or lizard bite will be. Then swelling starts spreading out from the bite. Severe burning pain at the site usually starts within minutes. Symptoms of a pit viper snakebite often appear from minutes to hours after a bite. Maine, Alaska, and Hawaii are the only states that don't have at least one poisonous snake species in the wild. Gila monsters and Mexican beaded lizards.Pit vipers (family Viperidae), such as a:.Poisonous snakes or lizards found in North America include: Medicine to counteract the effects of the poison (antivenom) can save a limb or your life. If you aren't sure what type of snake or lizard bit you, call the Poison Control Center right away to help identify the snake or lizard and find out what to do next. If you have been bitten by a snake or lizard that you know or think might be poisonous, call 911 or other emergency services right away. A bite from a poisonous (venomous) snake or lizard requires emergency care. ![]()
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