Skin 3D CT is an emerging imaging test in recent years. It is a test method that combines laser confocal microscopy and computed tomography, which can detect skin physiological and pathological states non-invasively, in real time and dynamically, and assist in the diagnosis and efficacy observation of a variety of pigmented, inflammatory and tumor-based skin diseases. The detection process is fast, convenient and painless. Features of the device: 1. Non-invasive is its biggest advantage. 3D skin CT can be imaged on the surface of living skin without histopathological biopsy, avoiding damage to the patient. 2, Image sensitivity and high resolution, can be imaged at the cellular level, effectively assist the diagnosis of a variety of skin diseases. 3, can real-time dynamic monitoring of skin disease changes, so as to more scientifically understand the progress of the disease and determine the effectiveness of treatment. Clinical indications: 1. pigmented skin diseases (including vitiligo, hypopigmented nevi, various colored nevi and chloasma, etc.); 2. inflammatory skin diseases (including psoriasis, lichen planus, dermatitis eczema, etc.); 3. infectious skin diseases (including herpes, flat warts, superficial fungal diseases, etc.); 4. neoplastic skin diseases (including seborrheic keratosis, basal cell carcinoma, squamous cell carcinoma, melanoma, etc.); 5. other .