1 Veins return blood from the legs to the heart. 2  There are two systems of veins in the leg: superficial and deep. 3  If a blood clot occurs in a deep vein (deep venous thrombosis), it causes a damming effect, and blood is trapped behind the blockage. 4  This causes redness, swelling, warmth, and pain in the affected area.
I am a 25 y o guy and trying to understand why my skin it feels like it is crawling sensation all underneath it, at first just on my face, like under my eyebrows, then on my fingernails and arms. What should I do. Itching is a common condition. The sensation of crawling underneath the skin is also well described, although somewhat more rare. Medically this is known as formication. This requires medical attention. I would recommend that you see your doctor. Formication can be caused by many conditions.
Many possibilities: The feeling of bugs crawling on your skin can be caused by a variety of different conditions some of which including peripheral neuropathy, fibromyalgia, vitamin B12 deficiency, morgellons disease and side effects to medications. You may even actually have little bugs crawling on your skin.any possibilities: The feeling of bugs crawling on your skin can be caused by a variety of different conditions some of which including peripheral neuropathy, fibromyalgia, vitamin B12 deficiency, morgellons disease and side effects to medications. You may even actually have little bugs crawling on your skin.