hi,i feel frequent numbness in my left leg lately, 'n very recently, parts of this leg's skin itches then shows colored patches ranging from blue to just darker skin with very hard knots underneath the patch. i've always felt sharp pokes and cramps in my heart area in both chest and back since i was a kid, but i ran all heart tests before that showed nothing. i started getting these knots under the skin of my left leg in the past few days. but the numbness and sleep of my leg started after sometime of having the hot part of my laptop sitting over it or near it all the time. i also found that my aunt has similar in but bigger knots on her legs as well but without color. should i be scared ?