Many people suffer from neck warts and other unsightly spots as they grow older. Besides the neck, you may notice them foaming on other area of your skin such as the eyelids, underarms, and chest. It's not enough that these warts keep foaming , but they grow darker and tougher over time. Coix seed (yokuinin) is practically a miracle plant for both cosmetics and medicine. In comparison to regular Tsubuporon EX: Coix, a product specifically made to treat these stubborn spots and give you back your healthy unblemished skin. The liquid in Tsubuporon Ex: Coix is loaded with coix seed and ingredients like pearl barley extract that soften warts.