Thrombophlebitis (throm-boe-fluh-BY-tis) occurs when a blood clot blocks one or more of your veins, typically in your legs. Rarely, thrombophlebitis (sometimes called phlebitis) can affect veins in your arms or neck.
The affected vein may be near the surface of your skin, causing superficial thrombophlebitis, or deep within a muscle, causing deep vein thrombosis (DVT). Thrombophlebitis can be caused by trauma, surgery or prolonged inactivity. Superficial thrombophlebitis may occur in people with varicose veins.
A clot in a deep vein increases your risk of serious health problems, including the possibility of a dislodged clot (embolus) traveling to your lungs and blocking an artery there (pulmonary embolism). Deep vein thrombosis is usually treated with blood-thinning medications. Superficial thrombophlebitis is sometimes treated with blood-thinning medications, too.
Aneurysm - is bulging of wall of the artery (rarely - of the vein) or heart due to its thinning or stretching. As a result develops so-called aneurysmal sac that can compress tissue disposed near. An aneurysm can be congenital. And, when a child birth, this defect is invisible, and the baby develops absolutely normally. To aneurysm also lead diseases, which thinning the blood vessels: hypertension, atherosclerosis, syphilis (late-stage). The risk of this insidious disease increases by trauma or injury of a blood vessel and during the formation of infected blood clots. With it people can live for years, make daily activities and have no symptoms. Meanwhile, the aneurysm will grow unnoticed, threatening at any moment to burst.
Atherosclerosis (Greek athera - gruel and the sclerosis) - is a chronic disease in which the inner wall of the arteries are deposited cholesterol and other fats in the form of plaques and plaque, and walls themselves are compacted and lose their elasticity. This leads to a narrowing of the lumen of the artery, and hence to the difficulty of blood flow. The victims of atherosclerosis usually become persons of middle and old age. However atherosclerotic changes are detected, in some cases in children and even in newborn.