What is the most effective treatment to remove thread veins on the face?

Thread veins on the face (telangiectasias) can be treated with ND YAG or KTP lasers. A KTP laser is a potassium titanyl phosphate (KTP) crystal as its laser medium. The KTP laser medium is energised through a beam generated by a neodynium:yitrium aluminium garnet ND YAG laser. This is directed through the KTP crystal to produce a beam in the green visible spectrum and has a wavelength of 532 nm.The ND YAG laser is a 1064 nm laser. 

Facial veins are a common problem and there are many ways to treat them including laser, IPL, VeinWave, VeinGogh, sclerotherapy and microneedle radiofrequency. Sometimes combination treatment works better than one individual way.  Most facial veins require several rounds of treatment (3-5) and a topical cream may also be necessary.  You need to see someone with experience in treating veins in this area.