Most insect and spider bites are harmless, though they feel unpleasant. Bee, wasp, and hornet stings and fire ant bites usually hurt. Mosquito, flea and mite bites usually itch. Insects can also transmit diseases, such as yellow fever and malaria. These diseases mainly are a risk for travelers outside the United States.

To prevent insect bites and their complications:

• Don't bother insects
• Use insect repellant
• Wear protective clothing
• Be careful when you eat outside because food attracts insects
• If you know you have severe allergic reactions to insect bites, carry an emergency epinephrine kit