Hello,
It can be due to dermatitis or petechiael spots. Petichiae are due to minute hemorrhage of blood below the skin. It is one of the findings in many disease conditions. The diseases in which petichiae are seen are Dengue fever, Measles, Infectious mononucleosis, Hodgkin's Lymphoma, Idiopathic Thrombocytopenic purpura, Scarlet fever. You should a general physician for diagnosis and treatment.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
I have the same condition, rash on my chest, arms, and lower legs. Doctor don't know what it is? Had several blood test all negative. They thought it was lupus? Test came out negative. Sending me to another doctor this is expensive and I do have implants. Could this be the problem? I had them replace 5 years ago. I have had the rash sense October 2014. I need help!