Improved Phototherapy in Patients With Vitiligo

Inclusion Criteria: * ① Age: 5 years old and above * Gender: unlimited * Types of vitiligo: sporadic vitiligo, facial and neck vitiligo, mixed vitiligo, undetermined vitiligo * Vitiligo course: unlimited; ⑤ Vitiligo activity level: stable period; ⑥ At least one white spot meets the following four conditions simultaneously: Location: limited to the neck, trunk, and limbs (excluding hairless areas of hands and feet); There are no contraindications for the use of NB UVB phototherapy and topical tacrolimus; Area: 1cm2 \< white spot area \< 1% body surface area; The vellus hair in the white spot area is all white; ⑦ It is agreed to discontinue all forms of treatment that may change the study outcome during the study period, including western medicine, traditional Chinese medicine, traditional Chinese patent medicines and simple preparations, biological agents, etc., such as Dihydroketiazide, 8-M0P, osteotonic, angelica dahurica, etc; Willing and able to follow the visit and treatment plan. Exclusion Criteria: * ① Segmental vitiligo, generalized vitiligo, mucosal vitiligo, and acromegaly vitiligo; * Degree of vitiligo activity: progression, rapid progression * Kobner phenomenon or white spots located at the site of skin trauma, or other subjects requiring emergency intervention; * Subjects who are sensitive to or have contraindications to ultraviolet radiation (suffering from photosensitive diseases such as xeroderma pigmentosum, porphyria, Bloom syndrome, systemic lupus erythematosus, dysplastic nevus syndrome, dermatomyositis, etc.); * Subjects with a history of malignant tumors (including skin squamous cell carcinoma, melanoma or other skin and systemic malignant tumors); * Subjects with severe systemic diseases; * Subjects who are allergic to tacrolimus ointment or excipients in the ointment; ⑧ Subjects who have received oral or systemic medication (such as corticosteroids, cyclosporine, methotrexate, tacrolimus, etc.) aimed at controlling/improving vitiligo symptoms within 4 weeks prior to baseline, or who require systemic use of corticosteroids or immunosuppressants for other reasons; ⑨ Subjects who have received any optical therapy (including sunbathing) for vitiligo within 4 weeks prior to baseline; ⑩ Subjects who have received topical treatment aimed at controlling/improving vitiligo symptoms (such as glucocorticoids, calcineurin inhibitors, vitamin D3 derivatives, etc.) within 2 weeks prior to baseline. ⑪ Pregnant and lactating female subjects; ⑫ Subjects who are judged by researchers to be unable to implement treatment plans correctly; ⑬ Child subjects who cannot cooperate with phototherapy protective measures;