Hello. Thank you for writing to us at healthcaremagic I suggest a possibility of either seborrheic dermatitis Or atopic dermatitis. In infants, dermatitis may involve the face and neck region as well as nappy area. The cream that you were using is an immunomodulator i.e pimecrolimus and is effective for milder skin involvement. However, for a flare I usually suggest a moderately potent topical steroid for the initial few days. Steroids are very effective in controlling a flare up of dermatitis Once the flare subsides, the patient can once again be switched over to milder pimecrolimus. I suggest that you visit a dermatologist in your region for a confirmatory diagnosis as well as appropriate prescription. Regards