What Causes Red Spots On The Body When Diagnosed With Raynaud S Disease?

Hi there, My son is 14 years old and has been diagnosed with Reynaud s disease. He had his blood tested and the results showed various allergies. We did not do the skin scratch test nor the intestinal permeability test. After going to an allergist, it was recommended that my son just avoid the things that make him feel itchy or as if he is having an allergic reaction, i.e. - apple skin. Just two days ago my son noticed little red spots on his hands, arms, legs, feet and back. It looks like a case of scleroderma. I have been doing some research and conclude that he has some kind of autoimmune condition. Can you tell me about your experience with these conditions? Thank you.