The treatment of choice for spider veins is sclerotherapy, as well defined by international treatment guidelines (European guidelines for sclerotherapy in Chronic venous disorders).
Within the different types of sclerotherapy, treatment with sclerosing drugs in liquid form should be prioritized over treatment with foam.
In any case, the combination of techniques is what usually offers the best results.
Foam sclerotherapy is an effective treatment to eliminate blue veins that feed small spider veins. In addition, it is also the treatment of choice in those patients where there is a contraindication such as allergy to the sclerosing drug to perform the cryosclerosis technique.