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.
Itch is an irritation in the skin that elicits an urge to scratch. Itches are a problem that everyone experiences and can be localized (limited to one area of the body) or generalized (occurring all over the body or in several different areas).Sometimes, depending upon the underlying cause, itching may be worse at night. In medical terminology, itching is known as pruritus.Generalized itch that occurs all over the body is often more difficult to treat than localized itch. Itches can also occur with or without skin lesions (bumps, blisters, rash, or abnormalities that can be seen on the skin).ryness of the skin is a common cause of itch. Itching of skin can lead to tears in the skin (excoriations) from scratching. Less commonly, generalized itching can be a sign of chronic medical conditions such as liver disease.