Varicose Veins, in themselves are nothing to worry about (thats what I was told at the time of my Class 1). The thing which matters most is their location, whether you have any other symptoms associated with them etc etc...
But do have them looked at by a Vascular Surgeon, because few years down the line they could be responsible for further complications...in my case my surgeon reckons varicose veins lead to further complications to cause a DVT. Only if I knew about it earlier
So take my advise, no matter what people say about them being harmless and all, get them checked by a vascular surgeon.