Feel like ants are crawling on skin/body?

Since Wednesday, it has been feeling like little bugs have been crawling on my legs and/or other parts of my body.. At first there was alot of crawling sensations on my skin, but the amount has went down is still there.. It kind of feel like someone's fingertips are tickling me, and my mom has been starting to experience these sensations too.. This hasn't happened before.. And it's annoying because they won't go away!