The sensation of bugs crawling on the skin is called formication, reports Wikipedia. Possible causes include menopause, exposure to pesticide, mercury poisoning, diabetic neuropathy and skin cancer. Another possible cause for the sensation of bugs crawling on the skin is Morgellons disease, reports WebMD.
One of the symptoms of menopause is crawling or itching skin, reports Jean Hailes for Women’s Health. Other symptoms include aches and pains, bloating, headaches and migraines, and hot flashes.
Morgellons is a condition that occurs when thread-like fibers appear under the skin, causing the sensation of crawling bugs, reports WebMD. Additional symptoms include a burning or stinging sensation, intense itching, and skin sores that heal slowly and leave very red scars. There is no known cure; however, it is recommended for sufferers to undergo psychiatric evaluation if it is suspected that Morgellons is present.