1. Pits, rough nails, and other surface alterations. 2. Severe nail dystrophy, hyponychia and anonychia, and alterations of nail shape. 3. Subungual hyperkeratosis. 4. Onycholysis. 5. Paronychia and pyogenic granuloma. 6. Nail discoloration. 7. Acro-osteolysis. 8. Dual pathology: onychomycosis and psoriasis. 9. The painful nail. 10. Tumors and swellings: lumps and bumps in the nail area.