Skin diseases refer to conditions that occur in the skin, mucous membranes, and their appendages, caused by various factors such as physical and chemical factors, pathogen infections, endocrine and metabolic factors, immune-related issues, and degenerative changes. Skin diseases can be categorized into general factors, such as age, gender, and race; external factors, such as mechanical, physical, plant-based, chemical, microbial, and parasitic causes; and internal factors, such as genetic, congenital, metabolic disorders, and endocrine imbalances. Common symptoms of skin diseases include itching, pain, numbness, and systemic symptoms such as chills, fever, fatigue, loss of appetite, and joint pain. Physical signs include rashes, papules, blisters, pustules, nodules, cysts, and other types of skin lesions. Infectious skin diseases are diverse; in addition to direct contact with the bodily fluids of patients, they can also be transmitted through contact with contaminated objects. Treatment methods for skin diseases mainly include systemic medications, topical medications, physical therapy, dermatological surgical therapy, and traditional Chinese medicine therapy. During treatment, it is important to fully consider the cause and progression of the disease and to provide individualized treatment. When using medications, patients need to be aware of individual differences and appropriately choose the most suitable drugs under the guidance of a doctor. For severe skin diseases, surgery may be necessary.