Need help identifying this rash?

A friend of mine has been complaining of a rash that comes and goes. Here is a text they just sent me. Any ideas of what it may be?

Ok my toes r purple, i have small round red spots that r slightly raised on one leg, n random larger flat red blotches on the other leg. my arms, from the elbow down, jst have a thin rash kinda randomly all over, n the outer edges of the palms of my hands r red, puffy, hot, n itchy. The rash only shows up on my eyelids, palms, knees+below on my legs, n elbows+below on my arms. Totally bizarre :'-(