Symmetrical dermatosis is an expression for the symptoms of dermatological diseases, which refers to abnormal manifestations on the skin surface with symmetrical distribution, commonly including symmetrical progressive leukoplakia, eczema, allergic dermatitis, chloasma, chickenpox, and progressive symmetrical erythematous keratoderma. The causes of symmetrical dermatoses vary, and factors such as genetics, ultraviolet light, endocrine function, and medication may cause such dermatoses. Once symptoms of symmetrical dermatoses appear, appropriate measures should be actively taken for treatment. If treating eczema, you can apply topical glycolic lotion, take oral levocetirizine hydrochloride, etc. For chickenpox, you can choose antiviral treatment with vaxilovir pellets, symmetrical progressive leukoplakia does not need treatment, treatment of melasma can be applied with hydroquinone depigmentation agent, and laser treatment is also available for those with medical aesthetic intention. For all types of symmetrical skin diseases, patients should keep the skin surface dry and clean on a daily basis, and change clothes as well as bed sheets regularly. Avoid scratching the affected area with your hands as much as possible to avoid breaking out the skin and inducing infection. Do not drink alcohol or strong tea during the disease, keep your diet light, do not eat stimulating foods, and avoid high stress and strain.