A 50-year-old obese male presents with multiple recent gum abscesses and loosening of his teeth. He also experiences skin itching and excessive urination. What is the most likely cause of his symptoms?

Explanation

The patient's symptoms of recurrent gum abscesses, loosening teeth, skin itching, and increased urination are characteristic of diabetes mellitus. While scurvy and vitamin A deficiency can cause oral and skin issues, they do not typically present with polyuria. Myxedema is related to hypothyroidism and typically does not cause these symptoms.