Spring has sprung, summer is heating up; insects and creepy crawlies are starting to buzz, wriggle, and flutter once again. Often these animals are treated as pests, yet bugs and insects play a very important role in our ecosystem. But more than that, many of these insects also have a long and important historical role in medical treatment and healthcare – a tradition that is continued in modern medicine. Here we explore some examples of these helpful bugs – all of which continue to be used by the NHS today!