This problem is patient and the problem that place of its family member cares. Some people use drug 3 ～ did not get effective 5 days, be eager to finding cure, the requirement is changed with the medicine with better curative effect, or demand tall medical service additionally. Anyhow, they hoped to use medical blaze to be able to improve immediately and even heal. This kind of mood that is eager to curing is understandable, but actually this does not do. Because the growth of normal and cuticular cell is periodic (namely the time that from translate into of cuticular base layer cell place of horny layer cell needs) it is 457 hours, agree time 19 days about. When having wind of white purplish or white patches on the skin, the melanin cell in be located in cuticular base layer is damaged or the function of generation melanin suffers restrain. Want to make the melanin cell of damage restores, or remove restrain, restore a function to also need period of time. This paragraph of time grows than normal and cuticular cell cycle grows more. Treat wind of white purplish or white patches on the skin from what world each country and our country each district report again get effective time looks, also need 6~12 week commonly. Accordingly, when should asking some medicine uses ability of how many time to judge its to have invalid fruit, the doctor always replies to need to use drug continuously at least 3 months. According to clinical practice, in the element of curative effect of medicaments of a lot of influence, type of wind of white purplish or white patches on the skin is a mainer factor, confine blaze should treat 2 months commonly, section, the limb end curative effect that should treat 3 months ability to judge medicaments commonly with extensive hairstyle blaze. Accordingly, answer to cooperate a doctor patiently to treat this disease. The small number of people medications 1 week of or so effective fruit. The reason that gets effective so quickly also is many sided, among them melanin cell is injured slight or the element of function of cell of block curb melanin is removed quickly to be main reason.