Allergy to milk manifested a variety of symptoms, but only some of them can be considered pathognomonic for this disease. The process involved many systems of the body, which complicates the diagnosis and often leads to wrong diagnosis. Symptoms range from acute anaphylaxis to abdominal pain, vomiting or diarrhea immediately after the reception of milk to slow reactions of the type of small gastrointestinal bleeding, which for months can pass unnoticed.
Data on the frequency of certain manifestations various and depend on the choice of the group of subjects, the age of the patients, diagnostic criteria and laboratory methods. Most often affect the gastrointestinal tract, then the respiratory tract and the skin and less other systems of the body.
Multiple symptoms are found in more than half of the patients [1-3]. In some patients divided by time contact with the antigen sometimes cause damage of various shock bodies; the latent period, the duration of symptoms and the severity of reactions can also vary widely. However, as a rule, the manifestations of the disease of each patient differ in certain stability. Analysis of five publications [2, 5-8]conducted Lebenthal [4]shows the following distribution of symptoms: diarrhea - 88%, vomiting and 44%, stomach pain - 39%, of eczema (atopic dermatitis)-33%, rhinitis - 31%, asthma - 31%, hives - 13% and anaphylaxis - 12%.
In this Chapter we consider the most frequent clinical manifestations of Allergy to cow's milk, as well as a brief look at the less common symptoms and signs of the disease.