Snake bites can be classified as either non-poisonous or poisonous. Poisonous snakes include cobras, kraits, and vipers, and their venom contains various toxic proteins and enzymes. Symptoms of snake bites depend on the type of venom and can include local effects like swelling as well as systemic effects like neurotoxicity, vascular damage, and myotoxicity. Treatment involves preventing venom spread, resuscitation, antivenom administration, and managing symptoms.