The causes of small granules on toenails include tinea pedis, corns, onychomycosis, lipoma and so on. 1. Tinea pedis: If the toe skin hyperplasia is triggered by fungal infection, the phenomenon of small granules can appear at this time. 2. corns: when the toes are worn out for a long time, the keratin proliferates, and then the phenomenon of small granules on the toenails will also appear. 3. Inguinitis: If embedded nails, trauma and other factors lead to bacterial infection in the nail groove, these bacteria will stimulate the surrounding tissues, resulting in tissue swelling, and thus the symptoms of small granulation of the toenail. 4. Lipoma: When many factors stimulate the proliferation of fat cells, small granules can also grow on the toes. Last but not least, please seek medical advice when you develop small granules on your toenails.