Yes, some ants are venomous. Ant bites and stings can cause serious symptoms and illness associated with allergic reactions and hypersensitivity to ant venom. Perhaps the most recognized reactions are seen when fire ants sting a person, particularly children, who are hypersensitive to the ant’s venom. Such occurrences may result in serious, maybe even life-threatening conditions. These stings generally create lesions and may also involve intense pain, swelling, itching and potential of anaphylaxis, a life threatening reaction that causes shock. In addition, secondary infections to ant bites and stings can occur if the bites and stings are not kept clean and properly disinfected.