My mom has been feeling something really strange lately, like there's a movement on the left side of her head, almost like something's crawling inside. It's making her itch a lot, and we're not sure what to do. She's now feeling this crawling sensation in her thigh and arm too, but it happens more often in her head. She's been taking medicine for weak veins, and I'm worried if this is something serious. Can you guide us on who we should consult for this?