Similar to sunburns , dehydration and rashes from poison ivy , bites from mosquitoes, ticks and other insects are a drawback of being outside when it’s warm. Not to mention, they can carry illnesses like malaria and Lyme disease. Applying insect repellent is one preventative measure you can take to avoid getting bitten, but figuring out which ones are actually effective can be confusing, seeing as the labels are often covered with complicated ingredients and jargon like “DEET” and “all-natural.”