Dealing with head lice is never pleasant, but one of the trickiest parts is figuring out just how long they’ve been around. If you’ve ever wondered whether those itchy scalp symptoms started last week or last month, you’re not alone. Lice are sneaky little critters, and spotting the signs of a longer infestation can be surprisingly challenging. Early Clues You Might Be Missing Head lice don’t make a grand entrance. When they first show up, they’re usually small and easy to overlook. It’s not until they’ve had time to multiply that the signs become obvious. So, how do you know…