What Causes Cutis Anserina After Taking Crystal Meth Injection?

i injected crystal meth lastnigt. about 20 mins after injecting, i started getting a goosebump feeling on my legs hands arms. the "goose bumbs" that apeared, i litterly watched as they turned red then watched this stuff grow out of my skin and it looks and feels exactly like the meth i injected. whats going on...