Bulging hand veins can be treated by sclerotherapy with excellent results. However, I have strong reservations about this approach. Since sclerotherapy, as its name clearly states, essentially scleroses (i.e. permanently close them off by scarring the inner walls together) the veins of the hands, should the future need ever arise for intravenous therapies or for frequent blood specimen withdrawals, these veins would no longer be available for use. A far better approach, and one that I frequently employ in my office, is to mask the bulgy veins (and tendons) with an appropriate injectable volumizing filler that restores volume to the hands--i.e. reversing the age-related fat loss that contributes to the bulgy appearance of the veins, as well as the skeletonous appearance of the hands that often comes with the passage of time. The procedure takes about ten minutes per hand to perform and the results are immediate. My choice for this purpose in my Upper East Side Manhattan office is Voluma XC. Radiesse Plus can also be used. In my Israel satellite facility, where a far greater number of regulatory agency approved volumizers are commercially available, I typically opt for Emervel Volume. Best to consult with a board certified aesthetic physician with experience and expertise in nonsurgically rejuvenating the hands. And be certain to ask to see his/her before and after photos. Good luck to you.