Bruising/discoloration on shins?

steephx0x

Hi, I have bruises/dark spots on my shins. There is a lot of them, mostly on the front of my shins and some on my thighs. I went to a doctor and they want me to get a skin biopsy, which is scheduled for next week. I run 2-3 miles a day (Wednesday and Sunday are rest days) and do some free weight exercise. I also walk everywhere cause I'm in the city. (Note: my doctor confirmed im not malnourished, I know my diet is awful but my doctor advised to find out what this is before making drastic changes to my lifestyle). I'm 19 and around 5'10. I was wondering if anyone had a similar experience? They're like bruises and reddish brown purple in color.