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Research has shown that the risks of complications and hence poor quality-of-life is lower than if the veins are not treated at all. This is why vascular surgeons perform the surgery. However, as with all medical interventions, there are possible risks.Everyone will get some pain and bruising because it is a surgical procedure, but it is important to remember it is so much less painful than stripping. Everyone will get small scars, but compared to the old stripping procedure, these are negligible and in good hands, are rarely visible six months later. It is possible to get wound infection, deep vein thrombosis or pulmonary embolism although all of these risks are very small. Provided the procedure is done under local anaesthetic, you will be fully mobile and deep vein thrombosis is very unlikely. If general anaesthetic or sedation is used, the risk of deep vein thrombosis increases because the patient mobility decreases and people are often asked not to drink before the procedure. Hence, only local anaesthetic should be used for endovenous surgery.It is possible to get some numbness after the surgery and this is usually transient. Under local anaesthetic, people can say "ow" and so it is rare to get a permanent nerve damage. Surgeons that still use general anaesthetic or sedation are more likely to causes problem as patients cannot let them know if a nerve is being damaged. This is another reason why true vein experts have not use general anaesthetic or sedation for years.The area of the vein being treated, usually the inner thigh, can be tender to the touch for a couple of weeks especially if the patient is slim. If the small saphenous vein is treated, then it is the calf that can be tender.If the radiofrequency has been performed correctly, then the vein should be permanently destroyed and should not come back again. However, in some practices, there can be some technical failures which means that in a small number of patients, the same vein may reopen in the future and need treatment again.Very rarely, a brown stain might become visible over the area where the vein is treated, or a patch of thread veins may appear. This is often a technical failure where the vein was too close to the skin and should have been treated by a different method. However, it is possible that this can occur in slim patients even when the appropriate techniques are performed.It is possible to get other varicose veins recurring again from other veins that have not been treated that were normal on the day of treatment.