Microsclerotherapy is a technique which was developed in the 1950s and 60s to treat spider veins. It evolved out of a doctor’s experience with Compression Sclerotherapy, with which it shares many similarities. It involves the use of an extremely fine needle to inject a tiny amount of a dilute solution (sclerosant) directly into the spider veins. The solution causes the lining of the vein to swell, eventually sealing off the blood vessels and preventing blood flow. At TVV Medispa, we use sodium tetradecyl, or polydocanol as our sclerosants of choice because they are painless and effective.