I thought the following was interesting. I've put the symptoms that Ted has in bold.
What are the symptoms of a dairy allergy?
The symptoms of a dairy allergy can manifest themselves in the skin, the digestive system or the respiratory system. Skin reactions may include an itchy red rash, hives, eczema, allergic "shiners" (black eyes), and swelling of lips, mouth, tongue, face or throat. Digestive system reactions might include nausea, vomiting, diarrhea, gas, bloating or abdominal cramps. Respiratory system reactions include a runny nose, sneezing, watery or itchy eyes, nasal congestion, wheezing, shortness of breath or coughing, and even anaphylactic shock. Some children may show reddish ear lobes or a glazed look in their eyes. Additional symptoms attributed to a milk allergy include bed-wetting, lethargy and inattentiveness.