Final answer:
The symptoms suggest a possible diagnosis of anemia. Lab tests such as a complete blood count can confirm the diagnosis, and treatment may involve addressing nutritional deficiencies and providing supplements if necessary.
Step-by-step explanation:
The symptoms described in the question indicate a possible diagnosis of anemia. Anemia is a condition in which there is a decrease in the number of red blood cells or a decrease in hemoglobin levels in the blood. In this case, the child's symptoms such as irritability, glossitis (inflammation of the tongue), picky eating, and excessive consumption of goat's milk suggest a nutritional deficiency anemia.
Lab tests that can help confirm the diagnosis include a complete blood count (CBC), which measures the levels of red blood cells, hemoglobin, and other blood components. Other tests, such as iron studies and vitamin B12 and folate levels, may be done to determine the specific cause of the anemia.
Treatment for anemia depends on the underlying cause. In this case, since the child is a picky eater and consumes a significant amount of goat's milk, it may be necessary to address nutritional deficiencies by providing a balanced diet and iron-rich foods. Supplements such as iron and vitamin B12 may be prescribed if necessary.