Benadryl

Jenny
Was wondering if giving an 8 month old benadryl is ok? My sweet girl has been scratching for a week. Her poor ears are swollen, she cant sleep, and her face is red. Went to the er and they said she has eczema but i think she's having an allergic reaction to something. I was told it goes by weight for a baby. Any ideas i what i can do to help calm the itch if benadryl is a big no no? I just hate seeing her like this