N.D.
Definitely get a consult with an allergist, but also know that keeping the skin moist with a low-allergenic cream (I like Eucerin; it is really thick but I used to slather it on the "bumpy spots" as soon as my kids got them and it REALLY helped), all-cotton clothing, and minimizing soap and water cleansing can all help. We ended up using a low dose of hydrocortisone cream when it was really bad, but the cotton (try Hanna Andersson for sleepwear, as most of the flame-retardant sleepwear for children made my kids' skin go nuts!) on top of thick gobs of Eucerin usually kept it in check and kept the steroid cream at a minimal level. You may need to go that route just to get it under control, but as soon as it subsides you can go to the milder, long-term "management" strategy. Instead of daily baths, I used Cetaphil cleansing lotion and wiped it off with a washcloth, only immersing my daughter every 2 or 3 days. Summer was the worst--the chlorine in pools really dried her out and we were very conscientious about rinsing in plain cool water after every swim, followed by Eucerin cream or lotion (they now make a "calming cream" which she still uses as a teenager when her skin is acting up).
Good luck!