Final answer:
Glossitis is the inflammation of the tongue, which could be caused by infections, nutritional deficiencies, or autoimmune diseases. Mrs. Byrd should consult a healthcare professional for an accurate diagnosis and appropriate treatment.
Step-by-step explanation:
Glossitis refers to the inflammation of the tongue, and it can be caused by various factors including infections, nutritional deficiencies, or autoimmune diseases. In the case of Mrs. Byrd, the mention of other related conditions like pharyngitis and gingivostomatitis suggests that her glossitis may be attributed to an infection. Based on the information given, it is not possible to determine the exact cause of her condition. Therefore, it is important for Mrs. Byrd to consult a healthcare professional for an accurate diagnosis and appropriate treatment.