Schlerotheropy has made my surface veins worse. Can you please advise?

You likely require a few treatments.  If you have larger vessels foam sclerotherapy or EVLT may be required.  Consultation with a vascular surgeon may be worth pursuing.  Our clinic offers consultation with sclerotherapy nurses and vascular surgeon  consultation for any case that is complex. 

One possible side effect of sclerotherapy is telangiectatic matting which is basically a cluster of very fine little red veins in the area of prior treatment as a result of excessive inflammation.  This is more common with foam sclerotherapy at stronger concentrations and/or with high injection pressure.  While you don't have a picture, the description you give resembles this.  Telangiectatic matting can often improve on its own if left alone, however, this often takes a long time (year or more) and in some cases it wont resolve on its own.  There is also the option of treating the area to hasten healing time. This can be done with the use of a special laser or a different sclerosant like glycerin with epinephrine that is not associated with matting.  I have used both of these successfully in my practice. Get another opinion from a vein specialist in your area. I hope this helps, best of luck.  

Some people are prone to matting, even if the doctor does everything correctly and you followed all the instructions. Unfortunately, a stronger solution can make things worse.