A 26-week-old baby boy presented with his mother. He has developed a generalized dry, red, itchy rash over the past seven weeks. His mother has been applying a regular emollient diligently and using a bath emollient. She reports that he is waking more and more frequently at night and appears to be troubled by his skin. She is worried about weaning him. He is currently breastfed and his mother has an unrestricted diet. He has been offered a bottle of formula milk, but took only 60 mL before vomiting and developing a rash.
He also developed a rash when his father kissed him, immediately after eating an egg mayonnaise sandwich. He is the first baby of his parents; his mother had asthma in childhood and his father is allergic to shellfish. There are no pets at home. His father is a smoker. The baby was born at term by normal vaginal delivery and is vaccinated to date. Examination His height…
