Clinical study of tranexamic acid drug-infiltrated threads for the treatment of melasma

INTERVENTION: Simple buried wire group:Simply buried wire;Tranexamic acid line implant group:Tranexamic acid line implantation;Tranexamic acid injection group:Tranexamic acid injection; CONDITION: melasma PRIMARY OUTCOME: Melasma area severity index;Patient satisfaction evaluation; INCLUSION CRITERIA: (1) Age 18 to 60 years old, female; (2) Those who have not received acupuncture point burial thread treatment before; (3) Meet the diagnostic criteria for melasma; (4) The clinical stage is a stable stage; (5) Each patient understands the purpose and method of this study before the trial, and voluntarily participates in it, and signs the informed consent of the trial Book.