What causes the sensation of insects crawling under my skin (formication)?

{ "value": { "answer": "**The Creepy-Crawly Truth: Understanding Skin Tingling and Formication During Menopause**\n\nIf you have ever been trying to relax or fall asleep, only to be suddenly distracted by the distinct sensation of tiny insects crawling across your skin—only to look down and find nothing there—you are not alone [1, 2]. Or perhaps you are experiencing sudden, unexplained bouts of \"pins and needles,\" burning, or tingling in your hands, feet, or face [3, 4]. \n\nIt is incred...