Dermatitis eczema: Dermatitis eczema is a large group of dermatological diseases and belongs to the common allergic skin diseases. The etiology is related to genetic allergic constitution. Eczema is one of the common diseases, the following briefly describe the characteristics of eczema: 1, intense itching, serious when it affects sleep, resulting in daytime mental trance, fatigue. 2, recurrent, lingering and difficult to heal, eczema is prone to recurrence, improper treatment in the acute phase, easy to turn into subacute and chronic eczema. If chronic eczema is not handled properly, it can lead to acute attacks. 3, exudative: seen in the acute phase of eczema and subacute phase, or acute episodes of chronic eczema. 4, rash polymorphic: rash including papules, papules, blisters, vesicles, exudate and other primary damage, scratching can cause scratch marks, blood impurities and other secondary damage. 5, symmetry, generalized: eczema can be limited to a certain part of the body, such as the ears, scrotum hands, etc., but can also be generalized throughout the body. The diagnosis of eczema is relatively easy, while the treatment is difficult, generally to use a combination of therapies, internal and external use of Chinese and Western medicines together. If improperly treated, it can easily aggravate the condition. Psoriasis: commonly known as psoriasis. Chinese medicine calls psoriasis “white mange”, which is a common chronic, recurrent, inflammatory skin disease. It is characterized by papules of varying sizes on the skin, erythema, covered with silvery white scales, and can involve the whole body. Some patients have seasonal exacerbations, manifesting as easy recurrence or exacerbation in winter and spring, and remission in summer and autumn. The cause of psoriasis is still unclear, and it is currently believed that psoriasis is the result of the interaction between genetic factors and environmental factors and other factors. Psoriasis can be divided into the common type, arthritic type, pustular type and erythrodermic type, of which the common type accounts for more than 99%. The other types are mostly induced by the external use of irritating drugs, the systematic use of glucocorticoids, sudden discontinuation of drugs during immunosuppression, as well as infection and mental stress in the course of common psoriasis. The treatment of psoriasis adopts different treatment methods according to different types. First of all, patients are told to lift their mental burden and try to avoid various triggering factors. At present, the various treatments for psoriasis can only achieve recent efficacy and cannot prevent recurrence. Psoriasis of the common type is not harmful to the body, so do not blindly pursue complete treatment and adopt drugs that can lead to serious adverse reactions (such as the systematic use of glucocorticoids, immunosuppressants, etc.), so as not to aggravate the disease or transform it to other types. Acne: Commonly known as acne, pimples, acne vulgaris, ancient Chinese medicine called facial sores, wine spurs. It is a chronic inflammatory skin disease that involves the sebaceous glands of hair follicles. It occurs at the site of seborrhea and can manifest itself as acne, papules, pustules, nodules, cysts and scarring. It is common in young men and women, and most often occurs on the head and face, neck, chest and back, and other areas with abundant sebaceous glands. The causes of acne are complex, mainly related to androgens, increased sebum secretion, abnormal keratinization of hair follicle sebaceous ducts, proliferation of Propionibacterium acnes and genetics. The onset of acne in some patients is also related to genetics, immunity, use of cosmetics, dietary stimulation and endocrine disorders, manifesting as familial clustering of acne, flare-ups or acne flare-ups associated with the menstrual cycle. The principles of treatment are lipid removal, dissolution of keratin, antiseptic, anti-inflammatory and regulation of hormone levels. Tinea capitis: (especially tinea pedis) is the most common superficial fungal disease, widely prevalent worldwide, with a high incidence in the summer and fall, often manifesting as heavy summer and light winter or summer onset and winter healing. The lesions tend to spread from one side to the opposite side. Based on clinical features, tinea pedis can be divided into three types: blistering and scaling, hyperkeratotic and macerated. Tinea pedis (especially the impetigo type) is prone to secondary bacterial infections, pustules, ulcers, and acute lymphangitis, lymphadenitis, cellulitis, or dermatitis, and can also lead to ringworm rash when the inflammatory reaction is significant. Therefore, attention should be paid to timely and thorough treatment of superficial fungal diseases to eliminate the source of infection; external medication is the mainstay of this disease, and the key to successful treatment is adherence to medication, and the course of treatment usually takes 1 to 2 months; internal medication can be considered for hyperkeratotic ringworm or for those who do not have good results with external medication. Herpes zoster: caused by varicella-zoster virus, characterized by clustered small blisters distributed along a unilateral peripheral nerve, often accompanied by significant neuralgia. The lesions are arranged in a band along one of the peripheral nerves, mostly on one side of the body, usually not exceeding the median line, and neuralgia is one of the features of the disease. It may occur before the onset of the disease or with the lesions, and is often more intense in older patients. Postherpetic neuralgia: Herpes zoster is often accompanied by neuralgia, but it mostly disappears after the lesions have completely faded or within 1 month, and in a few patients the neuralgia can last for more than 1 month, called postherpetic neuralgia, which is the most common complication. The principles of treatment are early antiviral, pain relief, anti-inflammatory, and prevention and control of complications. Warts: Common warts, flat warts, plantar warts and condyloma acuminata are commonly seen clinically. Warty epidermal dysplasia is also thought to be closely related to HPV infection. The source of infection is the patient and the healthy person with the virus, and it is mainly transmitted by direct or indirect contact. The virus enters the body through microscopic lesions in the skin and replicates and proliferates, causing benign epithelial redundancies. The population is generally susceptible to the disease, and immunocompromised and traumatized individuals are susceptible to the disease. The disease is mostly treated with topical medication and physical therapy, and internal medication is mostly used for those who have a large number of lesions or who have been untreated for a long time. Urticaria: commonly known as “rash”, is a limited edema reaction due to the reactive expansion and increased permeability of small blood vessels in the skin and mucous membranes. It recedes from time to time and leaves no trace after receding. The disease is relatively common, occurring at least once in the lifetime of about 15-25% of people. The exact cause cannot be found in most patients, especially in chronic urticaria. The causes of urticaria, especially chronic urticaria, are very complex and should be investigated one by one while excluding systemic diseases, such as changes in the surrounding environment, seasonal climatic changes, the presence of mental stress, digestive tract dysfunction, the presence of drug factors, the presence of chronic infection foci or other systemic diseases, and the removal of the cause is crucial in the treatment process. Pruritus is a skin disease with only pruritus without primary skin lesions. The etiology of this disease is complex. A variety of internal and external factors can cause generalized pruritus, including internal factors including individual skin traits, neuropsychiatric factors, systemic diseases (such as liver and kidney diseases, hematological diseases, endocrine and metabolic diseases, malignant tumors, parasites and other infectious diseases, and certain chronic lesions), pregnancy, drug or food allergies, etc.; external factors include environmental factors (such as season, temperature, humidity, light, work and living environment, etc.) , lifestyle habits (such as soap, cleaning and skin care cosmetics, wearing clothes, etc.). Certain primary skin diseases can also cause limited pruritus, such as infection (fungus, trichomonas, pubic lice, etc.), clothing stimulation, drug stimulation, etc. caused by female pubic pruritus and scrotal pruritus, hemorrhoids, anal fissure, pinworm infection caused by perianal pruritus, etc. For the treatment of pruritus, first of all, we should clarify the presence of systemic diseases and treat them in a timely manner, avoid local stimulation, including scratching, washing and scalding and improper treatment, and avoid eating irritating foods; external and internal medication