Fly ointment, also known as fly repellent, is a type of topical medication applied to the skin to avoid insect bites. However, there are several other synonyms of fly ointment, such as insect repellent, bug spray, mosquito lotion, and fly spray. These compounds are designed to deter bugs from landing on and biting exposed skin. They often contain DEET, picaridin or other compounds that are not attractive to insects. Fly ointment and its synonyms come in various forms, including sprays, lotions, creams, and salves. Using these repellents can help prevent the spread of infectious diseases, such as malaria and Zika.