Insect bites occur when insects such as mosquitoes, fleas, or ticks pierce the skin to feed on blood or other fluids. These bites can cause various reactions, ranging from mild irritation and redness to more severe allergic responses. The severity often depends on the type of insect and the individual's sensitivity. Most insect bites can be treated at home with basic care, including cleaning the area and applying cold compresses to reduce swelling. In some cases, over-the-counter antihistamines or hydrocortisone creams may help alleviate itching and discomfort. However, bites from certain insects, like ticks, can transmit diseases and may require medical attention.