Granulated Sugar Classic Formulas … Natural Herb Library

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Harmonizes the Spleen and Stomach - white granulated sugar appears in mild medicinal food use for abdominal discomfort, poor appetite, and weakness when a simple sweet support is appropriate.
Moistens the Lung and relieves dryness-type cough - it is used in household remedies for dry throat, dry cough, and scanty fluids.
Generates fluids and alleviates thirst - simple sugar water preparations are used when dryness, heat, or convalescent fatigue have depleted body fluids.

White sugar water - a simple convalescent preparation for thirst, dry mouth, and light depletion.
Sha Tang with pear or other moistening foods - household use for dry cough and throat discomfort.
White sugar mixed with water for topical application - minor folk external use for simple irritated lesions.

TCM Wiki describes white granulated sugar as sweet and neutral, entering the Spleen and Lung to harmonize the middle, moisten the Lung, and promote body fluids.
The same traditional summary highlights abdominal pain, dry mouth, and Lung-dryness cough as the main indications.
Like other refined sugars, its medicinal role is supportive and dietetic rather than strongly herbal.