Objectives This study aimed to compare telangiectasias disappearance after sclerotherapy with hypertonic glucose (HG) and different concentrations of sodium tetradecyl sulfate (STS). Methods Women aged 18–70 years with telangiectasias were included. The primary efficacy endpoint was telangiectasia disappearance. The clearing of vessels was assessed using a six-point scale (from 0 to 5). Results A total of 116 women completed an 8-week follow-up: 31, 27, 25, and 33 were in the HG 75%, STS 0.05%, STS 0.1%, and STS 0.15% groups, respectively. The median score of vein disappearance was significantly lower in the STS 0.05% (3, 0.25–4), STS 0.1% (3, 1.25–4), and STS 0.15% (4, 2–4) groups than in the HG group (4, 3–5) after 56 days, p = .00002. Conclusion Sclerotherapy of telangiectasias with 75% HG showed significantly better results than low concentrations of STS. Trial registration ClinicalTrials.gov NCT04132323.