Diabetic Foot Infection: This is the most likely diagnosis given the patient's hyperglycemic state and foot infection. Diabetic foot infections are common complications of diabetes and can be severe if not properly managed.

Cellulitis: A bacterial skin infection that can occur in anyone, but people with diabetes are more prone due to neuropathy and impaired circulation.
Abscess: A collection of pus that can form in the soft tissue of the foot, often as a result of a bacterial infection.
Osteomyelitis: An infection of the bone, which can occur in the foot, especially in people with diabetes due to neuropathy and poor circulation.
Sepsis: A life-threatening condition that can occur when the body's response to an infection becomes uncontrolled and causes widespread inflammation.

Necrotizing Fasciitis: A rare but deadly infection that destroys the tissue under the skin, including fat and the tissue covering the muscles (fascia). It requires immediate medical attention.
Gas Gangrene: A potentially deadly condition caused by a bacterial infection that produces gas in the tissues. It can lead to sepsis and death if not promptly treated.
Deep Vein Thrombosis (DVT): A blood clot that forms in the deep veins of the body, which can be a complication of hospitalization and immobility. It can lead to pulmonary embolism if the clot breaks loose.

Erythrasma: A bacterial infection that affects the skin folds, including between the toes, and can cause redness, scaling, and itching.
Mycetoma: A chronic infection caused by fungi or bacteria that can affect the skin and subcutaneous tissue, often presenting with swelling, sinus formation, and discharge.
Madura Foot: A chronic fungal infection of the foot, also known as mycetoma, which can cause significant destruction of the foot tissues if left untreated.