<unk>  can cause an immediate skin reaction. The<unk> from fire ants and the<unk> from bees, wasps, and hornets are usually painful.<unk>  caused by mosquitoes, fleas, and<unk>  are more likely to cause itching than pain.
Insect bites and stings
Spider bite
Human biting injuries
Mushroom poisoning
Hand washing
Body piercing
Smoke inhalation
Envenomation