What causes red patches on torso?
Patient: My 11 month old son had some red blotchiness on his torso and back of his neck yesterday that seems to have spread to his arms and legs now and up his face. What could be causing this? He doesn t have a fever and it doesn t seem to be itchy. How long do I wait to see if it just goes away? Doctor: Hello. I just read through your question. This is either a harmless viral rash, or a reaction to something.  Following it's course over the next 2-3 days is sufficient. If it continues to spread, you should consult your doctor. If not, you can leave it be.  In either case, it is not serious.