DS 5mo has over the last few weeks developed a few patches of dry skin on his chest, also his creases (elbows, underarms) are a bit red. His face is also a bit dry. I have been putting zerocream (an emollient) on all of the above, and done regularly it clears it up. Ex gave DS a bath today and his chest was a bit red, and he thinks a dermatologist visit is in order. Is this really necessary? Woukd another product be better? I use sudocrem on his bottom when it is very occasionally sore, and zerocream is what I put on my own dry skin.