What Is The Cause Of Red Lesions On Body?

Hi I noticed these brownish red lesions, or whatever they are, going up and down my calves.they don't hurt and don't look swollen. I got checked for blood clots and it was negative. I found something that looks similar called the toasted leg syndrome/ erthyma ab igne? I also was worried because I took birth control(ortho evra) for about 1.5 years, and I just took myself off of it.