Varicose Veins are enlarged, elongated and often tortuous superficial veins that become visibly prominent, most commonly in the legs. They arise when venous blood is not efficiently returned towards the heart and pressure within superficial veins remains elevated, causing the vessels to dilate and their walls and valves to undergo structural changes. The condition is common and often benign, although it can produce aching, heaviness, itching, swelling and skin changes and can occasionally lead to complications. Varicose Veins are distinct from Deep Vein Thrombosis because they primarily involve superficial venous circulation and generally develop through chronic venous hypertension rather than acute formation of a deep venous clot.
Normal leg veins return blood towards the heart against gravity through a combination of venous valves, contraction of surrounding muscles and pressure changes associated with breathing and movement. Venous valves help prevent blood from flowing backwards. When valves become incompetent, blood can reflux and increase pressure within affected veins, particularly during standing. Over time, sustained venous hypertension can cause vein dilation and changes to surrounding tissues. Varicose Veins may also occur when superficial veins communicate abnormally with deeper venous systems or when previous venous disease has impaired normal drainage. The underlying mechanism is therefore principally one of altered venous haemodynamics rather than simply excessive blood within the veins.
Several factors increase the likelihood of Varicose Veins. Increasing age is associated with cumulative changes in venous walls and valves, while family history suggests an important inherited component. Pregnancy increases venous pressure through hormonal effects and the mechanical effects of the enlarging uterus, and some pregnancy-associated varicosities improve after delivery. Occupations involving prolonged standing may increase symptoms or risk, although the relationship between standing and the development of varicosities is multifactorial. Obesity can increase venous pressure and is associated with chronic venous disease. Varicose Veins can also develop after previous venous thrombosis or other damage to the venous circulation.
Symptoms vary considerably. Some people have visible veins without discomfort, while others experience aching, heaviness, throbbing, itching, cramps or swelling that tends to worsen after prolonged standing and improve with elevation or movement. Chronic venous hypertension can produce skin pigmentation, eczema-like inflammation, lipodermatosclerosis and, in advanced cases, venous leg ulcers. Superficial thrombophlebitis can occur when a superficial vein becomes inflamed and thrombosed, causing a painful, firm cord beneath the skin. These complications differ from Deep Vein Thrombosis but can coexist with deeper venous disease, which is why unusual or extensive symptoms may require assessment.
Diagnosis of uncomplicated Varicose Veins is often clinical, based on examination while the person is standing. Duplex ultrasound can assess venous anatomy, blood flow and valve function and is particularly useful when intervention is being considered or when there is uncertainty about the underlying venous system. Ultrasound can identify reflux, obstruction and other abnormalities. The presence of visible varicosities does not necessarily indicate severe venous disease, and the extent of visible veins does not always correlate with symptom severity. Assessment may therefore consider symptoms, skin changes, ulceration, previous thrombosis and functional effects rather than appearance alone.
Management depends on symptoms, complications and individual circumstances. Regular movement can promote venous return through the calf-muscle pump, while leg elevation can reduce venous pressure and swelling. Compression garments can improve symptoms in selected people, particularly where chronic venous insufficiency is present, although suitability depends on arterial circulation and other factors. When symptomatic reflux is significant, procedures such as endovenous thermal ablation, sclerotherapy or surgical treatment may be considered. These interventions target abnormal superficial veins so that blood is redirected through healthier venous pathways. The choice depends on venous anatomy, symptoms, recurrence, previous procedures and clinical assessment.
Varicose Veins can recur after treatment because venous disease may involve multiple pathways and new reflux can develop over time. Treatment therefore does not necessarily permanently eliminate the underlying tendency to venous insufficiency. Severe chronic venous disease can cause ulceration, bleeding from fragile superficial veins or recurrent inflammation. Sudden unilateral leg swelling, significant pain, warmth or other acute changes should not automatically be attributed to pre-existing varicose veins because Deep Vein Thrombosis has a different clinical significance and may need exclusion. Likewise, a visibly prominent vein is not itself proof of a dangerous clot.
Common misconceptions include the idea that every Varicose Vein requires removal, that visible veins necessarily indicate poor circulation throughout the body, or that the condition is purely cosmetic. Many cases cause no meaningful symptoms, while others cause substantial discomfort or chronic venous complications. Varicose Veins also differ from spider veins, which are smaller superficial vessels that usually have different clinical significance. Maintaining mobility, addressing prolonged inactivity and managing contributing factors can help symptoms, but there is no universal exercise or dietary method that reliably eliminates established varicosities. Clinical evaluation is appropriate when symptoms become significant, skin changes develop, ulcers appear or the pattern changes unexpectedly.
