I am not sure how old your daughter is, but for my son (who is now almost 5) his eczema was really bad when he was 9 months old. It turns out he has a really bad dust allergy, along with (now mostly outgrown) allergies to eggs, milk, soy, peanuts, corn and beef. The thing that really helped him between the ages of 9 and 18 months was regular probiotics--we put it in his bottles of pumped milk at daycare or into applesauce on weekends. Our pediatrician told us, "there is no experimental proof it works, but please give it a try prior to any medications." In fact, I think we might try it again now.
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We started him on regular antihistamines when he was 3, but gave him occasional benadryl prior to that. the occasional benadryl helped him with really bad flares. We used (and still use) a prescription cream when the flares are at their worst, and use olive oil as a preventative daily.
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We only started a regular antihistamine (he takes one called Xyzal--which is second generation Zyrtec available only by prescription) when all attempts at control via diet and environment had failed. His flares were cracked and bleeding--we felt we had no choice.
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We are not anti-medication at all, but I would have felt very uncomfortable giving him regular medication prior to age 2. It took us quite a while to find the Xyzal--he failed trials of Zyrtec, Claritin, and Allegra. We're still looking for a medication to help with his asthma--he has failed trials of the medications we have tried for that as well.