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Diabetes, especially if uncontrolled, lowers the immunity status of the patient. They are prone for bacterial infection and/or fungal infestation. Candida, a common fungus usually invades nail beds, body surfaces and interior organs. The hallow organs like esophagus and stomach gets invaded commonly. Patient usually complains of burning sensation inside the chest and loss of appetite. It can be diagnosed through an endoscopy. Very good anti-fungal drugs are available, can be taken in consultation with the physician. Above all, diabetes should be controlled with glycosylated haemoglobin (HbA1c) level around 7%. A video of esophageal candidisis can be watched here.