How to differentiate between milia and flat warts

The differences between milia and flat warts are mainly reflected in the following aspects: 1. **Etiology**: Milia, medically termed as milium cysts, are typically small white cysts formed as a result of lipid metabolism abnormalities, cosmetic irritation, or the skin's self-repair process after injury. They are non-contagious. In contrast, flat warts are caused by infection with human papillomavirus (HPV), are contagious, and can spread through direct contact. 2. **Appearance**: Milia are usually small yellowish or white granules, about 1–2 mm in diameter, commonly appearing around the eyes and on the cheeks. Flat warts, on the other hand, are flat, round or oval-shaped papules that may appear blackish-brown, skin-colored, or light brown. They vary in size—from as small as a pinhead to larger lesions that may coalesce into patches up to approximately 1 cm in diameter. They commonly occur on exposed areas such as the face, neck, and arms. 3. **Treatment**: Milia generally do not require specific treatment and may resolve spontaneously, though they can also be removed using laser therapy or surgery. Flat warts require comprehensive treatment based on the individual condition, including medication or physical therapies, and it is important to take precautions to avoid spreading the infection. If you experience related symptoms, it is recommended to seek timely medical attention for accurate diagnosis and appropriate treatment.