Don't overheat rooms, especially the bedroom. Use light bedclothes. When itching from sweating, dust, pollen or other exposures, take a cooling shower or tub bath. Learn to recognize signs of infection and treat early. If you suspect food allergy, be systematic.
Likely offenders are eggs, milk, peanuts, soy, wheat and seafood, but any food can do it.
Keep a food diary. When the skin clears up, try the food. Watch for signs of itching or redness over the next two hours. Do not try a suspect food if it causes hives or face swelling . With allergy-prone kids, furry animals are a risk.