What are the clinical manifestations of common warts?

The clinical manifestations of common warts mainly include: 1. Skin lesion characteristics: Initially appear as pinhead-sized papules, which gradually enlarge to form round or polygonal rashes. The surface is rough, prominently keratinized, firm in texture, and may appear grayish-yellow, dirty-yellow, or brownish-black. 2. Papillary proliferation: As the condition progresses, the wart surface develops papillary projections—small, nipple-like structures resembling flower stamens or spines. 3. Bleeding and infection: Due to the keratinized and rough surface of the wart, bleeding may easily occur after friction or trauma, potentially leading to bacterial infection. 4. Distribution and number: Common warts can occur on any part of the body, but are most frequently found on the fingers, dorsum of the hands, and edges of the feet. The number varies; they may be solitary, multiple, or even number in the dozens, with some lesions coalescing into plaques. 5. Other special types: There are also special types such as periungual warts, subungual warts, filiform warts, and digitate warts, which differ in morphology and anatomical location.